Unit 5 Save the endangered animals 重点语法：含有形容词的it固定句型精讲练-2024-2025学年八年级英语下册重难点讲练全攻略（沪教牛津版）

2024-2025学年一线教师制作同步精品系列资料，好题优选！ 2024-2025学年一线教师制作同步精品系列资料，好题优选！ 学校:___________姓名：___________班级：___________考号：___________ Unit 5 Save the endangered animals 重点语法：含有形容词的it固定句型精讲练 语法知识精讲 辨析:it is + adj +for sb 和it is + adj + of sb. 一、基本结构对比 首先，我们来看这两个结构的基本形式： 1. It is + adjective + for someone + to-infinitive - 例如：It is important for you to study hard. 2. It is + adjective + of someone + to-infinitive - 例如：It is kind of you to help me. 二、形容词的类型 这两个结构的关键区别在于所使用的形容词的类型： 1. "For" 结构： - 这些形容词通常描述的是动作或情况的特性，而不是直接描述人的品质。 - 常见的形容词包括：important, necessary, essential, possible, difficult, easy, hard, etc. - 例如： - It is important for students to practice regularly. - "Important" 描述的是 "to practice regularly" 这个行为的重要性，而不是直接描述 "students"。 - It is difficult for me to solve this problem. - "Difficult" 描述的是 "to solve this problem" 这个动作的难度。 2. "Of" 结构： - 这些形容词通常描述的是人的性格、品质或态度，是对“某人”的评价。 - 常见的形容词包括：kind, nice, good, generous, clever, smart, stupid, rude, careless, etc. - 例如： - It is kind of you to help me. - "Kind" 直接描述 "you" 的善良品质。 - It was careless of him to leave the door unlocked. - "Careless" 直接批评 "him" 的粗心。 三、常见错误 学习者可能会混淆这两个结构，尤其是在某些形容词可以用于两种结构但意义不同的情况下。例如： - It is good for you to exercise. （锻炼对你有好处。） - "Good" 描述的是 "to exercise" 的好处。 - It is good of you to help. （你帮忙真是太好了。） - "Good" 描述的是 "you" 的善良。 语法知识精练 基础入门训练15题 1．—Let me help you carry the box, Ms Wang. —Thank you, Li Ping. It’s very nice ________ you ________ me. A．of; to help B．for; to help C．of; helping D．for; helping 2．Sophia is good at English. I think it’s easy ________ her ________ English well. A．for; to learn B．of; to learn C．for; learning D．of; learning 3．It is wrong ________ us ________ look down upon (看不起) the disabled people. A．of; to B．for; for C．to; to D．of; for 4．It’s very nice ________ you to give me such a chance. A．to B．for C．of D．at 5．________ is really exciting ________ them to take part in such ________ event. A．It; for; an B．It; to; an C．This; for; a D．This; to; a 6．—All of us think ________ dangerous for children to play with fire. —I agree. It’s important ________ to be safe all the time. A．it is; of them B．it; for them C．that is; of them D．that; for them 7．We think it is difficult ________ them ________ the charity walk without team spirit (精神). A．for; to finish B．of; to finish C．for; finishing D．of; finishing 8．It’s necessary ________ us to keep the classroom ________ every day. A．for; clean B．of; clean C．for; cleaning D．of; cleaning 9．It is impossible ________ me ________ all the new words in such a short time. A．of; to remember B．of; remember C．for; remember D．for; to remember 10．It’s really ________ him to save the boy out of the fire. A．wise of B．wise for C．brave for D．brave of 11．It’s good for us to ________ a good habit of brushing teeth in the childhood. A．developing B．show C．develop D．showing 12．It is selfish ________ Tom ________ his great ideas with us. A．for; to share B．of; to share C．for; not to share D．of; not to share 13．—Do you have any plans for the coming new year? —Yes. It’s necessary for us ________ resolutions for the Dragon Year of China. A．make B．making C．to make D．made 14．It’s difficult for your little brother ________ a horse. A．draw B．drawing C．to draw D．to drawing 15．It is very kind ________ you to help me with my lessons. It is really hard ________ me to learn them well. A．of; for B．of; of C．for; of D．for; for 进阶拓展训练15题 16．It’s easy for you ________. A．to work out the problem B．working out the problem C．work out the problem D．worked out the problem 17．—Tom looks sad every day. How can we help? —I think it’s important for him ________ a good friend. A．to have B．have C．has D．having 18．Can you hear the bell? It is time ________ us ________ have classes. A．for, to B．of, to C．for, for D．of, for 19．It’s important ________ you to learn English well. It’s clever ________ you to do so to learn English well. A．for; of B．to; of C．of; for D．for; for 20．It’s interesting ________ the monkeys in the zoo, they like to climb up and down. A．watching B．to watch C．watches D．watch 21．It was easy ________ everyone ________ the story and see the changes in Chinese society. A．to; to understand B．for; understand C．for; to understand D．to; understood 22．It’s very sensible _________ you to bring an umbrella in such weather. A．for B．of C．in D．with 23．I found ________easy ________ friends with the classmates in the club. A．that;to make B．it;making C．it;to make D．that;making 24．It’s so kind of you ________ the old man go across the street. You did a good job. A．help B．to help C．helping D．helps 25．I think it is easy ________me ________ there in one hour. A．of, to get B．for, to get to C．of, getting D．for, to get 26．It is brave _________ the man to take part in the competition. A．of B．for C．to D．with 27．It is not healthy for you ________ fast food every day. A．to eat B．eat C．to make D．make 28．—It’s polite ________ Chen Dan to offer his seat to the elderly when taking a bus. —Yes. I think it’s necessary ________ us to learn from him. A．for; for B．for; of C．of; of D．of; for 29．—James ate all the cake. I think it is wrong ________ him to refuse to share. —Really? I feel ________ is hard to believe. He is usually generous. A．of; it B．for; him C．for; it D．of; him 30．—It was careless ________ Daniel to leave the lights on again. —Yes. Let’s turn them off. A．of B．for C．to D．by 4 同步新课程，周周有练习，月月有重点！ 9 同步新课程，周周有练习，月月有重点！ 学科网（北京）股份有限公司 $$ 2024-2025学年一线教师制作同步精品系列资料，好题优选！ 2024-2025学年一线教师制作同步精品系列资料，好题优选！ 学校:___________姓名：___________班级：___________考号：___________ Unit 5 Save the endangered animals 重点语法：含有形容词的it固定句型精讲练 语法知识精讲 辨析:it is + adj +for sb 和it is + adj + of sb. 一、基本结构对比 首先，我们来看这两个结构的基本形式： 1. It is + adjective + for someone + to-infinitive - 例如：It is important for you to study hard. 2. It is + adjective + of someone + to-infinitive - 例如：It is kind of you to help me. 二、形容词的类型 这两个结构的关键区别在于所使用的形容词的类型： 1. "For" 结构： - 这些形容词通常描述的是动作或情况的特性，而不是直接描述人的品质。 - 常见的形容词包括：important, necessary, essential, possible, difficult, easy, hard, etc. - 例如： - It is important for students to practice regularly. - "Important" 描述的是 "to practice regularly" 这个行为的重要性，而不是直接描述 "students"。 - It is difficult for me to solve this problem. - "Difficult" 描述的是 "to solve this problem" 这个动作的难度。 2. "Of" 结构： - 这些形容词通常描述的是人的性格、品质或态度，是对“某人”的评价。 - 常见的形容词包括：kind, nice, good, generous, clever, smart, stupid, rude, careless, etc. - 例如： - It is kind of you to help me. - "Kind" 直接描述 "you" 的善良品质。 - It was careless of him to leave the door unlocked. - "Careless" 直接批评 "him" 的粗心。 三、常见错误 学习者可能会混淆这两个结构，尤其是在某些形容词可以用于两种结构但意义不同的情况下。例如： - It is good for you to exercise. （锻炼对你有好处。） - "Good" 描述的是 "to exercise" 的好处。 - It is good of you to help. （你帮忙真是太好了。） - "Good" 描述的是 "you" 的善良。 语法知识精练 基础入门训练15题 1．—Let me help you carry the box, Ms Wang. —Thank you, Li Ping. It’s very nice ________ you ________ me. A．of; to help B．for; to help C．of; helping D．for; helping 【答案】A 【详解】句意：——让我帮你搬这个箱子吧，王女士。——谢谢你，李平。你帮助我真是太好了。 考查it固定句型。“It’s + adj. + of/for sb. to do sth.”的用法。在该句型中，若形容词描述的是人的品质、性格等，如kind、nice、clever等，要用介词of；若形容词描述的是事物的性质、特点，如important、difficult、necessary等，要用介词for。本题中“nice”用于描述“you”的品质，所以要用介词of。同时，该句型中真正的主语是后面的动词不定式短语，所以第二个空应填to help。故选A。 2．Sophia is good at English. I think it’s easy ________ her ________ English well. A．for; to learn B．of; to learn C．for; learning D．of; learning 【答案】A 【详解】句意：索菲亚擅长英语。我认为对她来说学好英语很容易。 考查固定句型。“It’s+形容词+for sb. to do sth.”是固定句型，意为“对某人来说做某事是……的” ，其中it作形式主语，真正的主语是后面的动词不定式短语。这里表示对她来说学好英语容易。故选A。 3．It is wrong ________ us ________ look down upon (看不起) the disabled people. A．of; to B．for; for C．to; to D．of; for 【答案】A 【详解】句意：我们看不起残疾人是不对的。 考查it固定句型。It is+形容词+of sb+to do sth，it是形式主语，真正的主语是后面的动词不定式。故选A。 4．It’s very nice ________ you to give me such a chance. A．to B．for C．of D．at 【答案】C 【详解】句意：你给我这样一个机会，真是太好了。 考查介词在固定句型中的用法。to到；for对于、为了；of……的；at在。根据“It’s very nice...you to give me such a chance.”可知，句中“It’s+adj.+of sb. to do sth.”是一个固定句型，当形容词是用来描述人的性格、品质等特征时，使用“of”。本句中“nice”是描述“you”的品质，所以用“of”。故选C。 5．________ is really exciting ________ them to take part in such ________ event. A．It; for; an B．It; to; an C．This; for; a D．This; to; a 【答案】A 【详解】句意：他们参加这样的活动确实令人兴奋。 考查it固定句型。分析句子可知，该句句型为“it is adj for sb to do sth”意为“做某事对某人来说是……的”；且event以元音音素开头，其前应用冠词an。故选A。 6．—All of us think ________ dangerous for children to play with fire. —I agree. It’s important ________ to be safe all the time. A．it is; of them B．it; for them C．that is; of them D．that; for them 【答案】B 【详解】句意：——我们所有人都认为孩子玩火是危险的。——我同意。对他们来说始终保持安全是很重要的。 考查it作形式宾语和“it’s adj for sb to do”句型。第一空为“think it adj for sb to do”句型，it作形式宾语；第二空为“it’s important for sb to do”句型，意为“对某人来说做某事是重要的”，故选B。 7．We think it is difficult ________ them ________ the charity walk without team spirit (精神). A．for; to finish B．of; to finish C．for; finishing D．of; finishing 【答案】A 【详解】句意：我们认为他们不发扬团队精神，很难完成这次慈善步行。 考查it固定句型。for为了；of……的；to finish完成，动词不定式；finishing完成，现在分词。分析句子可知该句句型为“it is adj for sb to do”意为“做某事对某人来说是……的”。故选A。 8．It’s necessary ________ us to keep the classroom ________ every day. A．for; clean B．of; clean C．for; cleaning D．of; cleaning 【答案】A 【详解】句意：对我们来说，每天保持教室干净是有必要的。 考查介词辨析和动词形式。for对于；of……的，常用来表示所属关系等；clean干净的，是形容词；cleaning清洁、打扫，动名词或现在分词形式。根据“It’s necessary...us to keep the classroom...every day.”可知，句中“It's+形容词+for sb.+to do sth.”是一个固定句型，意为“对某人来说做某事是……的”，这里用“for”来引出不定式动作的逻辑主语，所以第一空用“for”；“keep+宾语+形容词”表示“使……保持某种状态”，“clean”在这里作宾语补足语，用来补充说明“the classroom”的状态，所以第二空用“clean”。故选A。 9．It is impossible ________ me ________ all the new words in such a short time. A．of; to remember B．of; remember C．for; remember D．for; to remember 【答案】D 【详解】句意：我不可能在这么短的时间内记住所有的新单词。 考查it的固定句式。分析句子结构并结合选项可知，此处为固定句式“it is+adj. for/of sb. to do sth.”，当形容词描述事物的性质，介词用for，若形容词描述人的特性，介词用of；impossible“不可能的”，描述事物的性质，介词用for。故选D。 10．It’s really ________ him to save the boy out of the fire. A．wise of B．wise for C．brave for D．brave of 【答案】D 【详解】句意：他把男孩从火中救出来真的很勇敢。 考查固定句型和形容词辨析。“It’s+形容词+of/for sb. to do sth.”是固定句型，当形容词描述人的性格、品质时用of，当形容词描述事情的性质时用for。wise和brave都是描述人的品质的形容词，这里说从火中救人，体现的是他勇敢的品质，应该用brave of。故选D。 11．It’s good for us to ________ a good habit of brushing teeth in the childhood. A．developing B．show C．develop D．showing 【答案】C 【详解】句意：从小养成刷牙的好习惯对我们有好处。 考查it的固定句型及动词辨析。developing逐渐养成，现在分词及动名词；show显示，动词原形；develop逐渐养成，动词原形；showing显示，现在分词及动名词。根据空后的“a good habit of brushing teeth”并结合选项可知，此处指养成刷牙的好习惯；分析句子结构可知，此处为固定句型“It’s+adj.+for sb. to do sth.”，意为“对某人来说，做某事是……的”。故选C。 12．It is selfish ________ Tom ________ his great ideas with us. A．for; to share B．of; to share C．for; not to share D．of; not to share 【答案】D 【详解】句意：汤姆不与我们分享他的好想法是自私的． 考查固定句型：it is+形容词+for sb.+to do sth.表示事物特征特点，it is+形容词+of sb. +to do sth.表示人物的性格；根据句意“汤姆不与我们分享他的好想法是自私的”，本题是说人的性格，同时后面selfish是自私的，应该是不分享，故选D。 13．—Do you have any plans for the coming new year? —Yes. It’s necessary for us ________ resolutions for the Dragon Year of China. A．make B．making C．to make D．made 【答案】C 【详解】句意：——你对即将到来的新年有什么计划吗？——有的。我们有必要为中国的龙年立下决心。 考查非谓语动词。分析句子结构可知，此处为“it is+形容词+for sb. to do sth.”结构，意为“对于某人来说做某事是……的”，所以C项符合。故选C。 14．It’s difficult for your little brother ________ a horse. A．draw B．drawing C．to draw D．to drawing 【答案】C 【详解】句意：对于你的小弟弟来说，画一匹马是很难的。 考查it固定句型。It is difficult for sb. to do sth.是固定搭配，意思是：对于某人来说做某事是很困难的，故选C。 15．It is very kind ________ you to help me with my lessons. It is really hard ________ me to learn them well. A．of; for B．of; of C．for; of D．for; for 【答案】A 【详解】句意：你帮我补课，你很善良。对我来说学好它们真的很困难。 考查介词用法。It’s adj. for/of sb. to do sth.“对某人来说做某事是……的”，固定句型，当形容词修饰人的品格时，如kind、nice等，介词一般用of；当形容词修饰事情的特点时，如hard、difficult等，介词一般用for。故选A。 进阶拓展训练15题 16．It’s easy for you ________. A．to work out the problem B．working out the problem C．work out the problem D．worked out the problem 【答案】A 【详解】句意：对你来说，解出这道题很容易。 考查动词不定式作主语。本句是It’s easy for sb to do sth句型，意为“对某人来说做某事很容易”，用动词不定式作真正的主语，故选A。 17．—Tom looks sad every day. How can we help? —I think it’s important for him ________ a good friend. A．to have B．have C．has D．having 【答案】A 【详解】句意：——汤姆每天看起来都很悲伤。我们如何提供帮助？——我认为对他来说有个好朋友很重要。 考查非谓语动词。分析句子可知，此句是“it is+形容词+for sb to do sth”结构，意思是“对某人来说做某事是……的”，it是形式主语，不定式是真正主语。故选A。 18．Can you hear the bell? It is time ________ us ________ have classes. A．for, to B．of, to C．for, for D．of, for 【答案】A 【详解】句意：你能听到铃声吗？我们是时候上课了。 考查介词辨析。for为了；to到；of……的。It is time for sb to do sth“对某人来说该做某事了”，为固定句型。故选A。 19．It’s important ________ you to learn English well. It’s clever ________ you to do so to learn English well. A．for; of B．to; of C．of; for D．for; for 【答案】A 【详解】句意：对你来说学好英语很重要。通过这种方式学好英语说明你很聪明。 考查介词辨析。本题考查句型“It’s adj. for/of sb. to do sth.”， 当形容词修饰物时，用介词for，当形容词修饰人时，用介词of。根据“It’s important...you to learn English well.”可知，是说学好英语很重要，应用介词for；根据“It’s clever...you to do so to learn English well.”可知，是说人聪明，应用介词of，故选A。 20．It’s interesting ________ the monkeys in the zoo, they like to climb up and down. A．watching B．to watch C．watches D．watch 【答案】B 【详解】句意：在动物园里看猴子很有趣，它们喜欢爬来爬去。 考查非谓语动词。根据“It’s interesting ... the monkeys in the zoo”可知，此处是句型“it’s+形容词+to do sth”，意为“做某事是怎么样的”，空处用不定式作真正主语。故选B。 21．It was easy ________ everyone ________ the story and see the changes in Chinese society. A．to; to understand B．for; understand C．for; to understand D．to; understood 【答案】C 【详解】句意：每个人都很容易理解这个故事并看到中国社会的变迁。 考查it的固定句型。to到；for为了。根据“It was easy...everyone...the story and see the changes in Chinese society.”可知，此处应是“it’s+形容词+for sb.+to do sth.”，表示“做某事对某人来说是……的”，第一空是介词for，第二空是不定式to understand。故选C。 22．It’s very sensible _________ you to bring an umbrella in such weather. A．for B．of C．in D．with 【答案】B 【详解】句意：在这种天气下你带伞是很明智的。 考查介词的用法。It’s +形容词+of/for+sb. to do sth.是固定句型。题干中形容词sensible用来修饰逻辑主语you，所以介词用of，用来描述人的品质或性格特征的。故选B。 23．I found ________easy ________ friends with the classmates in the club. A．that;to make B．it;making C．it;to make D．that;making 【答案】C 【详解】句意：我发现在俱乐部里和同学们交朋友是容易的。 此题考查it固定句型。that那个；it它；make制造。find it+形容词+to do sth.，表示“发现做某事是……的”。it在此作形式宾语。故选C。 24．It’s so kind of you ________ the old man go across the street. You did a good job. A．help B．to help C．helping D．helps 【答案】B 【详解】句意：你帮助那位老人过马路真是太好了。你做得很好。 考查动词不定式的用法。此处是it作形式主语，应用动词不定式作真正的主语。故选B。 25．I think it is easy ________me ________ there in one hour. A．of, to get B．for, to get to C．of, getting D．for, to get 【答案】D 【详解】句意：我认为我在一小时内到达那里是容易的。 考查it的固定句型和地点副词用法。“It is+形容词+for sb.+to do sth.”意为“对某人来说做某事怎么样”，形容词常与事物的特征有关；“It is+形容词+of sb.+to do sth.”表示“某人做某事怎样”，形容词常与人的性格特点有关。根据语境可知，此处的easy指的是在一小时内到达那里很容易，所以第一空应用for，排除选项A和C；根据第二空后的“there”可知是地点副词，前面不需要加介词。故选D。 26．It is brave _________ the man to take part in the competition. A．of B．for C．to D．with 【答案】A 【详解】句意：那个人参加比赛是很勇敢的。 考查介词辨析。of……的；for为了；to向，朝着；with和。根据“It is brave ... the man to take part in the competition.”可知，it is adj. of/for sb. to do sth.“某人做某事是……的”；brave形容人的品质，介词用of。故选A。 27．It is not healthy for you ________ fast food every day. A．to eat B．eat C．to make D．make 【答案】A 【详解】句意：每天吃快餐对你不健康。 考查非谓语及动词辨析。eat吃；make制作。此处是固定句型“It is+adj+for sb to do sth”，表示“做某事对于某来说是怎样的”，空处应用不定式形式，结合“It is not healthy for you...fast food”可知，吃快餐是不健康的，此处应用eat，故选A。 28．—It’s polite ________ Chen Dan to offer his seat to the elderly when taking a bus. —Yes. I think it’s necessary ________ us to learn from him. A．for; for B．for; of C．of; of D．of; for 【答案】D 【详解】句意：——坐公共汽车时，陈丹给老人让座是有礼貌的。——是的。我认为我们有必要向他学习。 考查介词辨析。for对于……来说；of……的。根据“polite”和“Chen Dan”可知，此处应用“It’s+形容词+of sb to do sth”，表示“某人做某事是怎么样的”，用来形容人的品质；根据“necessary”和“us to learn from him”可知，此处应用“It’s+形容词+for sb to do sth”，表示“对某人来说，做某事是怎么样的”，用于形容事物的性质。故选D。 29．—James ate all the cake. I think it is wrong ________ him to refuse to share. —Really? I feel ________ is hard to believe. He is usually generous. A．of; it B．for; him C．for; it D．of; him 【答案】A 【详解】句意：——詹姆斯吃了所有的蛋糕。我认为他拒绝分享是不对的。——真的吗？我觉得很难相信。他通常很慷慨。 考查介词及代词。第一个空，“it is+形容词+of/for sb. to do sth.”对某人来说做某事是…… 。“for sb.”与表示事物的特征特点的形容词连用。“of sb.”与表示人物的性格、品德、主观感情或态度的形容词连用。根据形容词wrong“错的”可知，形容人的行为用介词of。第二个空，“it is+形容词+to do sth.”做某事是……，固定句式，it是形式主语，不定式是真正主语。故选A。 30．—It was careless ________ Daniel to leave the lights on again. —Yes. Let’s turn them off. A．of B．for C．to D．by 【答案】A 【详解】句意：——丹尼尔太粗心了，又没关灯。——是的。让我们把它们关掉。 考查介词辨析。of……的；for为了；to向，朝着；by通过。根据“It was careless ... Daniel to leave the lights on again.”可知，it is adj. for/of sb. to do do sth.“做某事对某人而言是……的/某人做某事是……的”；careless“粗心的”，形容人的性格，介词应用of。故选A。 4 同步新课程，周周有练习，月月有重点！ 9 同步新课程，周周有练习，月月有重点！ 学科网（北京）股份有限公司 $$