Unit 5 Looking into nature 重点语法：that、if、whether引导的宾语从句精讲精练-2025-2026学年八年级英语下册重难点讲练全攻略（外研版）

**基本信息** 以“核心规则+易混辨析”双表构建宾语从句方法体系，通过40道梯度题实现从语法规则到解题应用的逻辑闭环，强化语言能力与思维品质。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |语法知识精讲|2个核心表格（含12条规则+8个例句）|主句时态决定从句时态、陈述语序、引导词用法区分（that/if/whether）、if与whether辨析（or not连用等3种场景）、that省略规则（3种情况）|从“引导词-含义-动词-语序-时态”核心规则到“if/whether辨析+that省略”易混点细分，形成“概念-规则-辨析”三层递进逻辑| |语法知识精练|40道题（覆盖中考高频考法）|通过典型题强化规则应用，如时态匹配、语序判断、引导词选择|题目对应精讲模块，从基础应用（单引导词）到综合辨析（易混点），实现知识迁移与思维训练|

2025-2026学年一线教师制作新教材英语同步精品系列资料，名师遴选！ 2025-2026学年一线教师制作新教材英语同步精品系列资料，名师遴选！ 学校:___________姓名：___________班级：___________考号：___________ Unit 5 Looking into nature 重点语法：that、if、whether引导的宾语从句精讲精练 语法知识精讲 一、核心总表（用法全总结，中考高频） 宾语从句核心规则：主句时态决定从句时态，从句一律用陈述语序（主语+谓语，不倒装），引导词用法区分是重点。 引导词 核心含义 适用主句动词类型 语序要求 时态变化规则 经典例句 （含否定/疑问） that 无实际含义，仅起连接作用（译为“that”可省略） 表“陈述、认为、相信”等，如：say、think、believe、know、find、hope 陈述语序（主语+谓语） 1. 主句一般现在时，从句随句意用任意时态； 2. 主句一般过去时，从句用相应过去时态 1. He says (that) he likes English.（主句现在时） 2. She said (that) she had finished her homework.（主句过去时） if 是否（表疑问，不可省略） 表“疑问、不确定”，如：ask、wonder、want to know、don’t know 陈述语序（主语+谓语，切勿倒装） 同that引导的从句，遵循“主现从任意，主过从过去” 1. I ask him if he will come tomorrow.（主句现在时） 2. He wondered if I was free yesterday.（主句过去时） whether 是否（表疑问，不可省略，语气比if委婉） 同if，可用于更正式场景或特殊结构 陈述语序（主语+谓语） 同that、if引导的从句，时态随主句变化 1. She wants to know whether it will rain.（常规用法） 2. I don’t know whether to go or not.（与or not连用） 二、易混重点细分表（中考必考辨析） 1. if与whether用法区别（高频易错点） 用法场景 if（是否） whether（是否） 中考考点提醒 与or not连用 不可以（× if...or not） 可以（√ whether...or not） 最常考区别，记“or not配whether” 作介词宾语 不可以 可以（如：think about whether...） 介词后只能用whether 引导不定式（to do） 不可以 可以（如：whether to do sth） 不定式前必用whether 常规疑问句作宾语 可以（口语、非正式场景常用） 可以（书面、正式场景常用） 两者可互换，无区别 2. that的省略规则（基础易错点） 情况 是否可以省略that 例句 单个that引导的宾语从句，位于主句动词后 可以省略（推荐省略，更简洁） I think (that) he is right.（省略后不影响句意） 多个that引导的并列宾语从句（第二个及以后） 不可以省略（必须保留that） He said (that) he was tired and that he wanted to rest.（第二个that必留） that从句位于主句动词与其他成分之间 不可以省略（避免句意混淆） I find it important that we should study hard.（that不可省） 语法知识精练 1．The teacher asked ________ we knew the danger of natural disasters. A．what B．which C．whether D．who 【答案】C 【详解】句意：老师问我们是否知道自然灾害的危险。 what什么（引导宾语从句时需在从句中充当主语/宾语）；which哪一个（引导宾语从句时需有明确的选择范围）；whether是否（引导宾语从句时从句本身结构完整，仅需表达疑问含义）；who谁（引导宾语从句时指代人并作主语/宾语）。根据句子“we knew the danger of natural disasters”本身结构完整，不缺主语或宾语，且老师询问的是我们对于自然灾害危险的了解情况，即是否知道，应填whether。 2．I think ________ English is one of the most important subjects. A．that B．if C．what D．where 【答案】A 【详解】句意：我认为英语是最重要的科目之一。 that无实义；if是否；what什么；where哪里。“English is one of the most important subjects.”为宾语从句，从句结构完整，表示陈述观点，应用that引导宾语从句。 3．—My favorite book is Gone with the Wind. —Me too. The last sentence “After all, tomorrow is another day!” encourages us _______. A．how can we make tomorrow better B．that we should never lose hope for the future C．what we should do to welcome tomorrow D．when should we start a new plan for tomorrow 【答案】B 【详解】句意：——我最喜欢的书是《飘》。——我也是。最后一句话“毕竟，明天又是新的一天！”激励着我们，要永远不要对未来失去希望。 考查宾语从句。how can we make tomorrow better我们怎样才能让明天更美好（疑问语序）；that we should never lose hope for the future我们永远不应该对未来失去希望（陈述语序）；what we should do to welcome tomorrow我们应该做什么来迎接明天（陈述语序）；when should we start a new plan for tomorrow我们什么时候开始制定明天的新计划（疑问语序）。此处是宾语从句，用陈述语序，故排除A、D项。根据名句寓意可知，强调“不放弃希望”，that we should never lose hope for the future符合。故选B。 4．—Mike, why is the ancient saying “A single piece of wood can’t make a fire” meaningful? —Because it teaches us ________. A．how can we find dry wood B．that teamwork achieves greater things C．why we should protect forests D．when do people need warmth 【答案】B 【详解】句意：——迈克，为什么这句古话“一根木头难烧火”有意义呢？——因为它教会我们团队合作可以成就更伟大的事业。 考查宾语从句。空处为宾语从句，从句用陈述语序，排除A、D；“A single piece of wood can’t make a fire”的含义是“一根木头难烧火”，喻为单打独斗难以成事，而团队协作能实现更大目标，B项“团队合作可以成就更伟大的事业”符合。故选B。 5．— Look at those dark clouds! I wonder ________. — Maybe we should take an umbrella. A．that it will rain B．if it is going to rain C．when will the rain stop D．how did the weather change 【答案】B 【详解】句意：——看那些乌云！我想知道是否要下雨了。——也许我们应该带把伞。 that it will rain天要下雨；if it is going to rain是否要下雨；when will the rain stop雨什么时候停（疑问语序）；how did the weather change天气怎么变化的（疑问语序）。根据前句“dark clouds”及答句“take an umbrella”可知，此处想知道是否会下雨，且宾语从句需用陈述语序。 6．I’m not sure ________ I should take a raincoat or not. A．that B．if C．whether D．which 【答案】C 【详解】句意：我不确定我是否应该带雨衣。 that无实义；if如果/是否；whether是否；which哪一个。根据句末的“or not”可知，此处考查固定搭配“whether…or not”，意为“是否……”。if引导宾语从句表示“是否”时，通常不与or not连用。应填whether。 7．The boy fell off his bike and he’s having an X-ray to see ________ his arm is broken or not. A．until B．before C．whether D．while 【答案】C 【详解】句意：那个男孩从自行车上摔了下来，他正在拍X光片看看他的胳膊是否骨折了。 until直到……为止；before在……之前；whether是否；while当……时候。句末的“or not”提示，此处表示“是否”，whether... or not，固定搭配，引导宾语从句。故选C。 8．We discussed ________ we should visit the museum or the park. A．that B．if C．whether D．what 【答案】C 【详解】句意：我们讨论了我们是应该参观博物馆还是公园。 that那；if如果/是否；whether是否；what什么。根据“we should visit the museum or the park.”可知，此处是whether ... or ... 结构，意为“是……还是……”。 9．—I’m planning a trip to Harbin this summer holiday. I wonder ________ July is the best time to go there. —Why not go online to get more information about it? A．when B．what C．where D．whether 【答案】D 【详解】句意：——我计划今年暑假去哈尔滨旅行。我想知道七月是否是去那里的最佳时间。——为什么不上网获取更多关于它的信息呢？ when什么时候；what什么；where哪里；whether是否。根据语境可知，说话人不确定七月是不是最佳时间，表示“是否”之意，应用whether引导宾语从句。 10．— I don’t know ________ I should accept his advice or not.                          — You’d better think it over carefully. A．if B．whether C．unless D．since 【答案】B 【详解】句意：——我不知道是否应该接受他的建议。——你最好仔细考虑一下。 根据句末的“or not”可知，此处构成固定搭配“whether... or not”，意为“是否……”。if 引导宾语从句表示“是否”时，通常不与or not连用。应填whether。 11．My parents are discussing ______ to book hotels online or not for our trip to Shanghai. A．whether B．when C．where D．why 【答案】A 【详解】句意：我父母正在讨论是否为我们去上海的旅行在网上预订酒店。 whether是否；when什么时候；where哪里；why为什么。根据句中“or not”可知，此处构成固定搭配whether ... or not，表示“是否”。故选whether。 12．________ you believe it or not, he finished the whole marathon in under three hours. A．If B．Whether C．Although D．Unless 【答案】B 【详解】句意：信不信由你，他不到三小时就跑完了全程马拉松。 If如果；Whether是否；Although虽然；Unless除非。本句使用了固定搭配Whether you believe it or not，意为“信不信由你”，用来引出令人惊讶的事实，符合句意。 13．—Could you tell me ________ the meeting ________ tomorrow morning? —I need to make a schedule. A．if; will start B．that; starts C．when; start D．where; will starts 【答案】A 【详解】句意：——你能告诉我会议明天上午是否会开始吗？——我需要制定一个日程表。 if是否；that引导宾语从句，无实义；when什么时候；where哪里。第一空，主句“Could you tell me...”后接宾语从句，根据答句“我需要制定日程表”可知，问句是在询问会议的相关情况，结合选项，if符合语境；第二空，时间状语“tomorrow morning”表示将来，宾语从句需用一般将来时“will start”。 14．She asked me ________ the film Ne Zha before I came to the cinema. A．if I have seen B．that I saw C．if I had seen D．whether I see 【答案】C 【详解】句意：她问我在我来电影院之前是否看过电影《哪吒》。 根据主句谓语asked可知从句表示疑问“是否”，应用if或whether引导，排除B项；第二空，从句动作“看电影”发生在过去动作came之前，表示“过去的过去”，应用过去完成时had seen。A项为现在完成时，D项为动词原形，时态不符。故选C。 15．I am evaluating ________ my learning strategies are effective. A．whether B．what C．because D．that 【答案】A 【详解】句意：我正在评估我的学习策略是否有效。 whether是否；what什么；because因为；that无实义。根据“I am evaluating... my learning strategies are effective.”可知，从句结构完整，表示评估策略“是否”有效，应用whether引导宾语从句。 16．—Let’s go fishing if it ________ fine this weekend. —But nobody knows if it ________. A．is, will rain B．will be, rains C．will be, will rain D．is, rains 【答案】A 【详解】句意：——如果这周末天气好，我们去钓鱼吧。——但没人知道是否会下雨。 第一空，if引导条件状语从句，表示“如果”，主句是祈使句，从句需用一般现在时，主语it后需用be动词is；第二空，if引导宾语从句，表示“是否”，根据时间状语this weekend可知描述将来情况，应用一般将来时will rain。 17．—How’s the weather tomorrow? I don’t know if it ________ tomorrow. —Well, if it ________, I won’t go out with you. A．will rain; will rain B．rains; rains C．rains; will rain D．will rain; rains 【答案】D 【详解】句意：——明天的天气怎么样？我不知道明天是否会下雨。——嗯，如果下雨，我就不和你出去了。 第一个if引导宾语从句，意为“是否”，根据时间状语“tomorrow”可知应用一般将来时will rain；第二个if引导条件状语从句，意为“如果”，遵循“主将从现”原则，主句为一般将来时，从句应用一般现在时，主语“it”是第三人称单数，应用rains。 18．He asked ________ I liked reading novels. A．if B．that C．what D．why 【答案】A 【详解】句意：他问我是否喜欢读小说。 if是否；that无实义；what什么；why为什么。根据“He asked”及从句“I liked reading novels”主谓宾结构完整可知，此处表示一般疑问句含义“是否”，应用“if”引导宾语从句。 19．I wonder ________ he will come to the party or not. A．if B．that C．whether D．what 【答案】C 【详解】句意：我想知道他是否会来参加派对。 if是否；that无词义，起连接作用；whether是否；what什么。当宾语从句中出现or not时，表示“是否”的引导词通常用whether，而不是if。 20．I really want to know ________ we can predict an earthquake exactly. A．which B．who C．if D．whose 【答案】C 【详解】句意 “我真的想知道我们能否精确预测地震”， which多用于定语从句，who引导定语从句，if引导宾语从句，whose引导定语从句。这里表达 “是否、能否” 含义，用if引导宾语从句。 21．I don’t know ________ or not he will come to the disaster lesson. A．if B．whether C．that D．what 【答案】B 【详解】句意：我不知道他是否会来上防灾课。 if如果；whether是否；that那个；what什么。在该句中，“I don’t know”为主句，“whether or not he will come to the disaster lesson”为宾语从句，是对不确定情况的询问。B选项“whether”专门用于引导表示选择、疑问的从句，且“whether or not”是固定搭配，符合本句语境，所以B选项正确。 22．He asked me ________ I would prepare for the coming typhoon. A．that B．what C．if D．where 【答案】C 【详解】句意 ：他问我是否会为即将到来的台风做准备。 从句为完整一般疑问句含义，表达 “是否”，用if。that无疑问含义；what/where在从句需充当句子成分，本句从句结构完整，无需额外成分。 23．Lingling told me ________ you wanted to visit the museum. A．what B．which C．that D．who 【答案】C 【详解】句意：玲玲告诉我你想参观博物馆。 根据“Lingling told me ... you wanted to visit the museum.”可知宾语从句是陈述句且成分完整，不缺主语或宾语，应用that引导。 24．— Do you know ________ red stands for good luck in China? — Of course! A．how B．where C．that D．what 【答案】C 【详解】句意：——你知道在中国红色代表好运吗？——当然！ how如何；where在哪里；that引导陈述语气的宾语从句，无实际意义；what什么。根据“Do you know... red stands for good luck in China”可知，know后接宾语从句，从句主谓宾结构完整且表示客观事实，需用that引导。 25．He told me ________ he would go to Shanghai tomorrow, but he didn’t say ________ he would go there by plane or by train. A．that; if B．if; that C．that; that D．/; / 【答案】A 【详解】句意：他告诉我他明天要去上海，但他没说他将乘飞机还是乘火车去那里。 that宾语从句中不翻译；if是否，用于引导宾语从句。分析句子可知，第一空后是陈述语气的宾语从句，用that引导；第二空后面的“or”表示“是否”，用 if 或 whether引导宾语从句。 26．She believes ________ her daughter ________ up with the latest fashion soon. A．that; will keep B．if; will keep C．that; keeps D．if; keeps 【答案】A 【详解】句意：她相信她的女儿不久将会跟上最新的时尚。 believes后接宾语从句陈述观点，引导词应用that；根据时间状语soon可知，从句动作发生在将来，谓语动词用一般将来时will keep。 27．—Mom always says “Actions speak louder than words.” What does it mean?   —It shows ________. A．why we should speak loudly B．what we can do to be quiet C．that what you do is more important than what you say D．where to find good actions 【答案】C 【详解】句意：——妈妈总是说“行动胜于言语”。这是什么意思？——这表明你所做的比你所说的更重要。 why we should speak loudly我们为什么大声说话；what we can do to be quiet我们可以做什么来保持安静；that what you do is more important than what you say你做的比你说的更重要；where to find good actions在哪里找到好的行动。“Actions speak louder than words”是英语常用谚语，字面意思是“行动比言语声音大”，实际含义是“做比说更重要”或“事实胜于雄辩”。根据谚语含义可知，空格处应填入表示行动比言语重要的句子，选项C符合题意。 28．Most people didn’t realise ________ they could recycle waste in daily life. A．what B．that C．which D．who 【答案】B 【详解】句意：大多数人没有意识到他们在日常生活中可以回收废物。 what什么；that无实义；which哪一个；who谁。根据“they could recycle waste in daily life”可知，宾语从句结构完整，不缺成分，且表示陈述事实，应用that引导。 29．The report says ________ the air quality has improved. A．that B．if C．whether D．where 【答案】A 【详解】句意：报告说空气质量已经改善了。 that无实际意义，引导宾语从句；if是否/如果；whether是否；where哪里。根据句子结构，says后接宾语从句，从句“the air quality has improved”是陈述一个确定的事实，不包含疑问、条件或地点含义，因此用that引导宾语从句，应填that。 30．I know ________ I promised to take you to dinner, but I didn’t finish working until ten o’clock. A．that B．if C．what D．why 【答案】A 【详解】句意：我知道我承诺过带你去吃晚饭，但我直到十点才完成工作。 that引导宾语从句无实义；if是否；what什么；why为什么。从句“I promised to take you to dinner”结构完整，且表示确定的事实，应用that引导。 31．I don’t doubt ________ he will pass the exam, but I doubt ________ he can get the highest score in our class. A．if; that B．that; whether C．that; that D．whether; if 【答案】B 【详解】句意：我不怀疑他会通过考试，但我怀疑他是否能在我们班取得最高分。 don’t doubt表示“不怀疑”时语气确定，后接 that 引导的宾语从句；doubt 用于肯定句时，表示“怀疑”，语气不确定，后接 whether或 if 引导的宾语从句。根据“I don’t doubt”可知第一空填 that，根据“I doubt”可知第二空填 whether。 32．He thought ________ it must be the king’s musicians playing beautiful music outside. A．how B．that C．why D．what 【答案】B 【详解】句意：他心想那一定是国王的乐师在外面演奏美妙的音乐。 how如何；that无实义引导词；why为什么；what什么。宾语从句中，若从句是完整的陈述句，不缺成分，常用that引导。本句从句结构完整，表示想法的具体内容，无疑问含义。 33．She told me ________ she bought a new dress in the shop yesterday. A．that B．if C．when D．where 【答案】A 【详解】句意：她告诉我她昨天在商店买了一条新裙子。 that无实义；if是否；when什么时候；where哪里。根据“She told me…she bought a new dress in the shop yesterday.”可知，句子为宾语从句，“she bought a new dress in the shop yesterday”是完整的陈述句，不缺成分且表示确定的事实，用that引导。应填that。 34．—The teacher told us ________ the sun ________ in the east and ________ in the west. —It’s an objective truth. A．if; rises; sets B．that; rises; sets C．that; rose; set D．whether; rise; set 【答案】B 【详解】句意：——老师告诉我们太阳从东方升起，从西方落下。——这是一个客观事实。   if是否；that引导陈述句的宾语从句（无实义）；whether是否；rises升起（一般现在时，第三人称单数）；sets落下（一般现在时，第三人称单数）；rose升起（一般过去时）；set落下（一般过去时）。根据答句“这是一个客观事实”可知，宾语从句陈述的是客观真理，不受主句时态影响，仍用一般现在时；且主句动词“told”后跟that引导的宾语从句表示陈述事实，应填that；rises；sets。 35．Did you hear ________ there would be a qipao show next week? A．what B．that C．which D．if 【答案】B 【详解】句意：你听说下周将有一场旗袍秀了吗？ what什么；that无实义；which哪一个；if是否。“there would be a qipao show next week”是完整的陈述句，表示确定的消息，应用that引导宾语从句，只起连接作用。 36．I truly know ________ Chinese tea is very popular around the world. A．that B．who C．where D．whom 【答案】A 【详解】句意：我确实知道中国茶在世界各地非常受欢迎。 that（连接词，无实义）；who谁；where在哪里；who谁。分析句子结构，空格后是一个成分完整的陈述句，在主句动词know后作宾语，属于宾语从句。当宾语从句是陈述句时，应用连接词that引导，that在从句中不充当任何成分，也没有实际意义。 37．—Fu Xing, what does “Pull up young plants to help them grow.” mean? —The saying tells us _________. A．when should we grow plants B．that we can’t break the law of nature C．how people do farming D．that it’s necessary to pull up plants 【答案】B 【详解】句意：——付兴，“拔苗助长”是什么意思？ —— 这句俗语告诉我们，我们不能违背自然规律。 考查宾语从句。when should we grow plants我们应该什么时候种植植物；that we can’t break the law of nature我们不能违背自然规律；how people do farming人们如何从事农业生产；that it’s necessary to pull up plants有必要把植物拔起来。根据“Pull up young plants to help them grow.”以及“The saying tells us”可知，“拔苗助长”这个故事警示人们不能违背自然规律，此处应用that引导宾语从句。故选B。 38．—John, why is “A man can be destroyed but not defeated” by Hemingway educational? —Because it tells us ________. A．how a man can beat others B．that we should never give up C．what success means D．why our physical health is the most important 【答案】B 【详解】句意：—— John，为什么海明威的“人可以被毁灭，但不能被打败”具有教育意义？——因为它告诉我们永远不应该放弃。 考查习语和that引导宾语从句。how a man can beat others 一个人如何打败其他人；that we should never give up 我们永远不应该放弃；what success means成功意味着什么；why our physical health is the most important为什么我们的身体健康最重要。“A man can be destroyed but not defeated” 出自海明威的小说《老人与海》，强调了精神上的坚韧和不屈，即使面对失败，也要保持不放弃的态度。选项B“that we should never give up”为that引导的宾语从句，符合语境。故选B。 39．—Would you mind telling me if he ________ the meeting in three days? —He won’t, unless he ________. I’m sure. A．will attend; is invited B．attends; will be invited C．attends; invites D．will attend; will be invited 【答案】A 【详解】句意：——你介意告诉我他三天后是否会参加会议吗？——除非他被邀请，否则他不会参加的。我确定。 根据“in three days”可知，第一空所在句为一般将来时，谓语部分的结构为“will+动词原形”，所以第一空用will attend；根据“unless”可知，第二空所在句为条件状语从句，遵循“主将从现”原则，从句用一般现在时表将来；主语“he”是动作“invite”的承受者，所以第二空用一般现在时的被动语态，其结构为“am/is/are+动词过去分词”，主语“he”为第三人称单数，be动词用is，所以第二空用is invited。 40．I don’t know ________ he will come tomorrow. ________ he comes, I’ll tell you. A．if; Whether B．whether; Whether C．if; If D．if; That 【答案】C 【详解】句意：我不知道他明天是否会来。如果他来了，我会告诉你。 if和whether都有“是否”的意思，引导宾语从句时一般可以互换；if还有“如果”的意思，引导条件状语从句。第一空，根据“I don’t know...he will come tomorrow.”可知，此处是不知道他明天“是否”会来，用if或whether均可；第二空，根据“...he comes, I’ll tell you.”可知，此处是“如果”他来就告诉“我”，用if引导条件状语从句。 12 同步新教材，周周有练习，月月有重点！ 11 同步新教材，周周有练习，月月有重点！ 学科网（北京）股份有限公司 $ 2025-2026学年一线教师制作新教材英语同步精品系列资料，名师遴选！ 2025-2026学年一线教师制作新教材英语同步精品系列资料，名师遴选！ 学校:___________姓名：___________班级：___________考号：___________ Unit 5 Looking into nature 重点语法：that、if、whether引导的宾语从句精讲精练 语法知识精讲 一、核心总表（用法全总结，中考高频） 宾语从句核心规则：主句时态决定从句时态，从句一律用陈述语序（主语+谓语，不倒装），引导词用法区分是重点。 引导词 核心含义 适用主句动词类型 语序要求 时态变化规则 经典例句 （含否定/疑问） that 无实际含义，仅起连接作用（译为“that”可省略） 表“陈述、认为、相信”等，如：say、think、believe、know、find、hope 陈述语序（主语+谓语） 1. 主句一般现在时，从句随句意用任意时态； 2. 主句一般过去时，从句用相应过去时态 1. He says (that) he likes English.（主句现在时） 2. She said (that) she had finished her homework.（主句过去时） if 是否（表疑问，不可省略） 表“疑问、不确定”，如：ask、wonder、want to know、don’t know 陈述语序（主语+谓语，切勿倒装） 同that引导的从句，遵循“主现从任意，主过从过去” 1. I ask him if he will come tomorrow.（主句现在时） 2. He wondered if I was free yesterday.（主句过去时） whether 是否（表疑问，不可省略，语气比if委婉） 同if，可用于更正式场景或特殊结构 陈述语序（主语+谓语） 同that、if引导的从句，时态随主句变化 1. She wants to know whether it will rain.（常规用法） 2. I don’t know whether to go or not.（与or not连用） 二、易混重点细分表（中考必考辨析） 1. if与whether用法区别（高频易错点） 用法场景 if（是否） whether（是否） 中考考点提醒 与or not连用 不可以（× if...or not） 可以（√ whether...or not） 最常考区别，记“or not配whether” 作介词宾语 不可以 可以（如：think about whether...） 介词后只能用whether 引导不定式（to do） 不可以 可以（如：whether to do sth） 不定式前必用whether 常规疑问句作宾语 可以（口语、非正式场景常用） 可以（书面、正式场景常用） 两者可互换，无区别 2. that的省略规则（基础易错点） 情况 是否可以省略that 例句 单个that引导的宾语从句，位于主句动词后 可以省略（推荐省略，更简洁） I think (that) he is right.（省略后不影响句意） 多个that引导的并列宾语从句（第二个及以后） 不可以省略（必须保留that） He said (that) he was tired and that he wanted to rest.（第二个that必留） that从句位于主句动词与其他成分之间 不可以省略（避免句意混淆） I find it important that we should study hard.（that不可省） 语法知识精练 1．The teacher asked ________ we knew the danger of natural disasters. A．what B．which C．whether D．who 2．I think ________ English is one of the most important subjects. A．that B．if C．what D．where 3．—My favorite book is Gone with the Wind. —Me too. The last sentence “After all, tomorrow is another day!” encourages us _______. A．how can we make tomorrow better B．that we should never lose hope for the future C．what we should do to welcome tomorrow D．when should we start a new plan for tomorrow 4．—Mike, why is the ancient saying “A single piece of wood can’t make a fire” meaningful? —Because it teaches us ________. A．how can we find dry wood B．that teamwork achieves greater things C．why we should protect forests D．when do people need warmth 5．— Look at those dark clouds! I wonder ________. — Maybe we should take an umbrella. A．that it will rain B．if it is going to rain C．when will the rain stop D．how did the weather change 6．I’m not sure ________ I should take a raincoat or not. A．that B．if C．whether D．which 7．The boy fell off his bike and he’s having an X-ray to see ________ his arm is broken or not. A．until B．before C．whether D．while 8．We discussed ________ we should visit the museum or the park. A．that B．if C．whether D．what 9．—I’m planning a trip to Harbin this summer holiday. I wonder ________ July is the best time to go there. —Why not go online to get more information about it? A．when B．what C．where D．whether 10．— I don’t know ________ I should accept his advice or not.                          — You’d better think it over carefully. A．if B．whether C．unless D．since 11．My parents are discussing ______ to book hotels online or not for our trip to Shanghai. A．whether B．when C．where D．why 12．________ you believe it or not, he finished the whole marathon in under three hours. A．If B．Whether C．Although D．Unless 13．—Could you tell me ________ the meeting ________ tomorrow morning? —I need to make a schedule. A．if; will start B．that; starts C．when; start D．where; will starts 14．She asked me ________ the film Ne Zha before I came to the cinema. A．if I have seen B．that I saw C．if I had seen D．whether I see 15．I am evaluating ________ my learning strategies are effective. A．whether B．what C．because D．that 16．—Let’s go fishing if it ________ fine this weekend. —But nobody knows if it ________. A．is, will rain B．will be, rains C．will be, will rain D．is, rains 17．—How’s the weather tomorrow? I don’t know if it ________ tomorrow. —Well, if it ________, I won’t go out with you. A．will rain; will rain B．rains; rains C．rains; will rain D．will rain; rains 18．He asked ________ I liked reading novels. A．if B．that C．what D．why 19．I wonder ________ he will come to the party or not. A．if B．that C．whether D．what 20．I really want to know ________ we can predict an earthquake exactly. A．which B．who C．if D．whose 21．I don’t know ________ or not he will come to the disaster lesson. A．if B．whether C．that D．what 22．He asked me ________ I would prepare for the coming typhoon. A．that B．what C．if D．where 23．Lingling told me ________ you wanted to visit the museum. A．what B．which C．that D．who 24．— Do you know ________ red stands for good luck in China? — Of course! A．how B．where C．that D．what 25．He told me ________ he would go to Shanghai tomorrow, but he didn’t say ________ he would go there by plane or by train. A．that; if B．if; that C．that; that D．/; / 26．She believes ________ her daughter ________ up with the latest fashion soon. A．that; will keep B．if; will keep C．that; keeps D．if; keeps 27．—Mom always says “Actions speak louder than words.” What does it mean?   —It shows ________. A．why we should speak loudly B．what we can do to be quiet C．that what you do is more important than what you say D．where to find good actions 28．Most people didn’t realise ________ they could recycle waste in daily life. A．what B．that C．which D．who 29．The report says ________ the air quality has improved. A．that B．if C．whether D．where 30．I know ________ I promised to take you to dinner, but I didn’t finish working until ten o’clock. A．that B．if C．what D．why 31．I don’t doubt ________ he will pass the exam, but I doubt ________ he can get the highest score in our class. A．if; that B．that; whether C．that; that D．whether; if 32．He thought ________ it must be the king’s musicians playing beautiful music outside. A．how B．that C．why D．what 33．She told me ________ she bought a new dress in the shop yesterday. A．that B．if C．when D．where 34．—The teacher told us ________ the sun ________ in the east and ________ in the west. —It’s an objective truth. A．if; rises; sets B．that; rises; sets C．that; rose; set D．whether; rise; set 35．Did you hear ________ there would be a qipao show next week? A．what B．that C．which D．if 36．I truly know ________ Chinese tea is very popular around the world. A．that B．who C．where D．whom 37．—Fu Xing, what does “Pull up young plants to help them grow.” mean? —The saying tells us _________. A．when should we grow plants B．that we can’t break the law of nature C．how people do farming D．that it’s necessary to pull up plants 38．—John, why is “A man can be destroyed but not defeated” by Hemingway educational? —Because it tells us ________. A．how a man can beat others B．that we should never give up C．what success means D．why our physical health is the most important 39．—Would you mind telling me if he ________ the meeting in three days? —He won’t, unless he ________. I’m sure. A．will attend; is invited B．attends; will be invited C．attends; invites D．will attend; will be invited 40．I don’t know ________ he will come tomorrow. ________ he comes, I’ll tell you. A．if; Whether B．whether; Whether C．if; If D．if; That 6 同步新教材，周周有练习，月月有重点！ 5 同步新教材，周周有练习，月月有重点！ 学科网（北京）股份有限公司 $