Unit 2 Healthy Lifestyle Grammar 动词不定式作主语练习-2025-2026学年高二英语人教版选择性必修第三册

学校:___________姓名：___________班级：___________考号：___________ Unit 2 Healthy Lifestyle 动词不定式做主语 一、单句语法填空 1． (catch) in sandstorms was a terrible experience. 2．It is our responsibility as scientists (declare) the value of this freedom. 3．It is important (protect)your skin from the harmful effects of the sun. 4．Mr Lee realizes that it’s essential for everyone (observe) the traffic rules. 5．It is everybody’s duty (protect) endangered species, like the giant panda. (所给词的适当形式填空） 6．It is appropriate (wear) a suit for a formal occasion. 7．It was his job (protect) the victims in the earthquake. 8．When he recalls his struggling years, he says it is not easy (balance)working and studying. 9．It is satisfying (finish) the work all by myself. 10．No matter how bright a talker you are, there are times when it’s better (remain) silent. 11． (bring) together Western Medicine and Traditional Chinese Medicine, rather than in competition is where the potential for great effects lies. 12．These days, it is not unusual for 10 to 12-year-olds to publish their own websites or for second and third graders (begin) computer classes. 13．Not that I don’t want to help, but that it’s beyond my power (monitor) or chart their work progress. 14．It took him a long period of time (finish) his revision. 15．It’s a very ordinary thing (keep) your distance from strangers. 16．On Monday mornings it usually takes me an hour (drive) to work although the actual distance is only 20 miles. 17．It is my great pleasure (welcome) all of you, officially, to the Asia-Pacific Economic Cooperation Economic Leaders’ Meeting. 18． (finish) this job in one day is impossible. 19．It is crucial (step) up international cooperation to minimize the COVID-19’s impact on economic growth. 20．It is likely (make) great difference if he made big fortune at that time. 21．It will take us several years (learn) a foreign language well. 22．The book and the film really show how important it is for humans (protect) the environment. 23．It’s my honour (have) the chance to speak to you. 24． (pass) the exam is a difficult job. 25．It is friendly of the family (try) to make me feel at home in their house. 26．It is never too much   (highlight) the necessity of punctuality for a job seeker. 27．It is very wise of him (read) this novel, in which there are many inspiring stories. 28．It is worthwhile (spend) two hours reading the book. 29．It can be a big headache (balance) your developing mental needs too. 30． (do) this is to cut the foot to fit the shoe. 31．We think it is reasonable to (assumption) they lived in these caves, regardless of the cold. 32．It took courage for Sarah (forgive) her friend the harsh words spoken in anger, but she knew it was necessary for their friendship. 33．It’s important to learn from past mistakes but also (move) forward without dwelling on them. 34．It was a great shock (find) out he had been lying. 35． (quit) smoking isn’t easy, so you could turn to me for help if necessary. 36．I suppose it never occurred to him (meet) with such a big problem. 37．Single-use plastic are used at most a few times before they are thrown away. It takes them hundreds of years (break) down. 38．It is abnormal for Mr.Lee (donate) some money to the poor children, because he is a selfish man. 39．For this person who has committed a serious mistake, it is such a great relief (forgive) by others. 40．It is indeed an honor for China’s scientific research and Chinese medicine (spread) around the world. 二、完成句子 41．In such things it’s always good . 处理这样的事情总以稳重为好。 42．It will be my honour ! 为您服务是我的荣耀! 43．It is necessary . 掌握一门外语是必要的。 44．When learning about a new topic, . 当学习一个新话题时，收集事实和数据是很重要的。 45． is foolish for Chinese people. 对中国人来说，庆祝外国节日是愚蠢的行为。 46．It is not unusual for teenagers of your generation to to computer games and the online world. 你们这一代的青少年被电脑游戏和网络世界吸引, 这没有什么不正常。 47．To fully realize your potential, it is important for you to our school resources. 要想全面发挥自己的潜能，充分利用我们学校的资源很重要。 48．It's easy for you to yourself and the world around you. 你很容易对自己和周围的世界满足。 49． , saving lives is of paramount importance, so it is vital . 毕竟，拯救生命是首要的，作好充足的准备工作至关重要。 50．We think the orphans. 我们认为照顾这些孤儿是我们的职责。 试卷第1页，共3页 试卷第1页，共3页 学科网（北京）股份有限公司 $ 学校:___________姓名：___________班级：___________考号：___________ Unit 2 Healthy Lifestyle 动词不定式做主语 一、单句语法填空 1． (catch) in sandstorms was a terrible experience. 【答案】To have been caught 【详解】考查动名词。句意：遭遇沙尘暴是一次可怕的经历。分析句子可知，catch作主语用表示具体的一次性动作用不定式，根据句意，动词先于谓语动词was发生，be caught in 突然遭遇(风、雨等) 故应用被动式，综上，用不定式的完成被动式，故填To have been caught。 2．It is our responsibility as scientists (declare) the value of this freedom. 【答案】to declare 【详解】考查动词不定式。句意：作为科学家，我们有责任宣布这种自由的价值。分析句子可知，it在本句中是形式主语，真正的主语是设空处的动词不定式，所给单词为declare，其不定式形式为to declare。故填to declare。 3．It is important (protect)your skin from the harmful effects of the sun. 【答案】to protect 【详解】考查动词不定式。句意：保护你的皮肤不受阳光的伤害是很重要的。It is important to do sth.做某事是重要的，固定句型，此处it是形式主语，真正的主语是动词不定式，所以空处需用动词不定式作主语。故填to protect。 4．Mr Lee realizes that it’s essential for everyone (observe) the traffic rules. 【答案】to observe 【详解】考查动词不定式。句意：李先生意识到每个人都必须遵守交通规则。it be + adj. + for sb. to do sth.，it是形式主语，动词不定式（to do）是真正主语。故填to observe。 5．It is everybody’s duty (protect) endangered species, like the giant panda. (所给词的适当形式填空） 【答案】to protect 【详解】考查非谓语动词。句意：保护像大熊猫这样的濒危物种是每个人的责任。分析句子可知，本句句型结构为：It+be+名词+动词不定式。It为形式主语，动词protect的不定式作真正主语。故填to protect。 6．It is appropriate (wear) a suit for a formal occasion. 【答案】to wear 【详解】考查非谓语动词。句意：在正式场合穿西装是合适的。It is adj.+to do为固定句型，it为形式主语，真正的主语是动词不定式。故填to wear。 7．It was his job (protect) the victims in the earthquake. 【答案】to protect 【详解】考查非谓语动词。句意：保护地震中的受害者是他的工作。此处用it作形式主语，to do不定式为真正的主语。故填to protect。 8．When he recalls his struggling years, he says it is not easy (balance)working and studying. 【答案】to balance 【详解】考查不定式。句意：当他回忆起自己奋斗的岁月时，他说平衡工作和学习并不容易。分析可知，此处为固定句型it be+adj.+to do“做某事是......”，it为形式主语，不定式是真正主语。故填to balance。 9．It is satisfying (finish) the work all by myself. 【答案】to finish 【详解】考查动词不定式。句意：独自一人完成这项工作是令人满意的。It is satisfying to do sth.做某事是令人满意的，固定句型，此处it作形式主语，真正的主语是动词不定式。故填to finish。 10．No matter how bright a talker you are, there are times when it’s better (remain) silent. 【答案】to remain 【详解】考查不定式。句意：不管你多么能言善辩，但有时候还是保持沉默更好。句中空格处的词是真正的主语，it是形式主语，因此要用不定式，故填to remain。 11． (bring) together Western Medicine and Traditional Chinese Medicine, rather than in competition is where the potential for great effects lies. 【答案】Bringing/To bring 【详解】考查非谓语动词。句意：西医和中医结合，而不是相互竞争，才是发挥巨大作用的潜力所在。分析句子结构可知，设空处应填非谓语动词做主语，可用to do和doing形式。故填Bringing或To bring。 12．These days, it is not unusual for 10 to 12-year-olds to publish their own websites or for second and third graders (begin) computer classes. 【答案】to begin 【详解】考查非谓语。句意：如今，10到12岁的孩子发布自己的网站，或者二年级和三年级的学生开始上电脑课，这并不罕见。此题考查“it is+形容词+for sb. to do sth.”，该结构it作形式主语，真正的主语为不定式。故填to begin。 13．Not that I don’t want to help, but that it’s beyond my power (monitor) or chart their work progress. 【答案】to monitor 【详解】考查动词不定式。句意：不是我不想帮忙，而是我没有能力监督或记录他们的工作进度。分析句子可知，it是形式主语，空处应填动词不定式作真正的主语，故填to monitor。 14．It took him a long period of time (finish) his revision. 【答案】to finish 【详解】考查非谓语动词。句意：他花了很长时间完成他的复习。此处为句型it takes/took sb. some time to do sth.表示“做某事花费某人多少时间”，it是形式主语，不定式是真正的主语。故填to finish。 15．It’s a very ordinary thing (keep) your distance from strangers. 【答案】to keep 【详解】考查非谓语动词。句意：与陌生人保持距离是很平常的事。分析句子结构，it作形式主语，空处应用动词不定式形式作真正的主语。故填to keep。 16．On Monday mornings it usually takes me an hour (drive) to work although the actual distance is only 20 miles. 【答案】to drive 【详解】考查非谓语动词。句意：星期一早上我上班通常要开车一个小时，虽然实际距离只有20英里。此处为句型it takes sb. some time to do sth.，it是形式主语，不定式短语作真正的主语。故填to drive。 17．It is my great pleasure (welcome) all of you, officially, to the Asia-Pacific Economic Cooperation Economic Leaders’ Meeting. 【答案】to welcome 【详解】考查非谓语动词。句意：很高兴正式欢迎大家出席亚太经合组织领导人非正式会议。根据句意及所给句子可知，此处是固定句型It is/was one’s pleasure to do sth.“做某事是某人的荣幸”，it是形式主语，真正的主语是后面的动词不定式短语。故填to welcome。 18． (finish) this job in one day is impossible. 【答案】To finish 【详解】考查非谓语动词。句意：要在一天之内完成这项工作是不可能的。分析句子可知，空处应用动词不定式to finish作主语，空处位于句首，to的首字母需大写。故填To finish。 19．It is crucial (step) up international cooperation to minimize the COVID-19’s impact on economic growth. 【答案】to step 【详解】考查非谓语动词。句意：加强国际合作，减少新冠肺炎疫情对经济增长的影响是至关重要的。分析句子可知，此处用了It is adj. to do sth.的固定句型，It作形式主语，真正的主语是动词不定式，空处应用to step。故填to step。 20．It is likely (make) great difference if he made big fortune at that time. 【答案】to make 【详解】考查不定式。句意：如果他当时赚了大钱，那情况就大不相同了。It is likely to do是固定短语，意为“可能做某事”，其中it是形式主语，真正的主语是不定式，因此空格处是to make。故填to make。 21．It will take us several years (learn) a foreign language well. 【答案】to learn 【详解】考查不定式。句意：学好一门外语要花我们好几年。此处为固定句型：it takes/will take sb.+一段时间+to do“做某事画某人……”，it是形式主语，不定式（短语）是真正的主语。故填to learn。 22．The book and the film really show how important it is for humans (protect) the environment. 【答案】to protect 【详解】考查动词不定式。句意：这本书和这部电影真正展示了保护环境对人类的重要性。it为show之后宾语从句的形式主语，故本空用不定式to protect构成短语作真正的主语。故填to protect。 23．It’s my honour (have) the chance to speak to you. 【答案】to have 【详解】考查非谓语动词。句意：我很荣幸有机会和你们讲话。此处为句型It’s my honour to do sth.，不定式作真正主语，故填to have。 24． (pass) the exam is a difficult job. 【答案】Passing/To pass 【详解】考查动名词短语作主语。句意：通过考试不是一件容易的事情。表示一般性的行为时，用动名词作主语；表示一次性的行为时，用不定式作主语，故填Passing/To pass。 25．It is friendly of the family (try) to make me feel at home in their house. 【答案】to try 【详解】考查非谓语动词。句意：这家人很友好，尽力使我在他们家有宾至如归的感觉。此处为 It be adj. of sb. to do sth. 句式，it作形式主语，不定式作主语。故填to try。 26．It is never too much   (highlight) the necessity of punctuality for a job seeker. 【答案】to highlight 【详解】考查非谓语动词。句意：对于一个求职者而言，再怎么强调守时的必要性都不为过。分析句子结构可知，本句中It是形式主语，设空处应为不定式作真正的主语，所以此处应使用不定式形式。故填to highlight。 27．It is very wise of him (read) this novel, in which there are many inspiring stories. 【答案】to read 【详解】考查非谓语动词。句意：他读这本小说是很明智的，里面有许多鼓舞人心的故事。根据“It is very wise of him”可知，此处用固定句型It is adj. of sb. to do sth.，表示“某人做某事是怎么样的”，用于对某人的评价，其中It是形式主语，不定式短语是真正的主语，空处应用read的不定式形式to read。故填to read。 28．It is worthwhile (spend) two hours reading the book. 【答案】spending/to spend 【详解】考查非谓语动词。句意：花两个小时读这本书是值得的。It is worthwhile to do sth./doing sth.意为“做某事是值得的”，固定句型，It为形式主语，不定式或动名词为真正的主语。故填to spend/spending。 29．It can be a big headache (balance) your developing mental needs too. 【答案】to balance 【详解】考查动词不定式。句意：平衡你正在发展的心理需求也是一件很头疼的事。此处it为形式主语，应用to do不定式作真正的主语。动词balance意为“平衡”。故填to balance。 30． (do) this is to cut the foot to fit the shoe. 【答案】To do 【详解】考查非谓语动词。句意：这样做就是把脚切成适合鞋子的形状。分析句子可知，“(do) this”作主语，do是非谓语动词；结合句意，表示具体且尚未完成的动作，用不定式作主语；句首单词首字母大写。故填To do。 31．We think it is reasonable to (assumption) they lived in these caves, regardless of the cold. 【答案】assume 【详解】考查动词。句意：我们认为，有理由认为，不管天气多么寒冷，他们都生活在这些洞穴里。此处it为形式主语，to do不定式为真正的主语，应用动词assume表示“认为”。故填assume。 32．It took courage for Sarah (forgive) her friend the harsh words spoken in anger, but she knew it was necessary for their friendship. 【答案】to forgive 【详解】考查动词不定式。句意：Sarah需要勇气去原谅她朋友在愤怒中说出的严厉话语，但她知道这对她们的友谊是必要的。分析句子可知，it takes sth. to do sth.是固定句型，意为“做某事需要付出某物”，其中it是形式主语，to do sth.为动词不定式作真正主语。故填to forgive。 33．It’s important to learn from past mistakes but also (move) forward without dwelling on them. 【答案】to move 【详解】考查非谓语动词。句意：从过去的错误中吸取教训是很重要的，但也要向前看，不要停留在过去的错误上。It是形式主语，空处和“to learn”并列，使用动词不定式作真正的主语，故填to move。 34．It was a great shock (find) out he had been lying. 【答案】to find 【详解】考查非谓语动词。句意：发现他一直在撒谎是一个巨大的震惊。设空处使用不定式结构作主语，it为形式主语，不定式为真正的主语。故填to find。 35． (quit) smoking isn’t easy, so you could turn to me for help if necessary. 【答案】Quitting/To quit 【详解】考查非谓语动词。句意：戒烟不容易，如果需要的话，你可以找我帮忙。空处和空后的smoking搭配，作句子的主语，是非谓语动词，可用quit“停止，戒掉”的动名词形式或不定式形式，且句首单词的首字母需大写。故填Quitting/To quit。 36．I suppose it never occurred to him (meet) with such a big problem. 【答案】to meet 【详解】考查非谓语动词。句意：我想他从未想到会遇到这么大的问题。句中it为形式主语，空处应用动词不定式作真正的主语；occur to sb.“某人突然想到”。故填to meet。 37．Single-use plastic are used at most a few times before they are thrown away. It takes them hundreds of years (break) down. 【答案】to break 【详解】考查非谓语动词。句意：一次性塑料最多使用几次就会被扔掉。它们需要数百年才能分解。it takes sb./sth. some time to do sth.是固定句型，意为“花费某人/某物多久做某事”，空处应用break的不定式形式，作真正的主语，It为形式主语。故填to break。 38．It is abnormal for Mr.Lee (donate) some money to the poor children, because he is a selfish man. 【答案】to donate 【详解】考查非谓语动词。句意：李先生给贫困儿童捐钱是反常的，因为他是个自私的人。根据固定句型“It is + adj. + for sb. to do sth.”意为“对某人来说做某事是……的”可知，此处应用动词不定式作真正的主语，it为形式主语。故填to donate 39．For this person who has committed a serious mistake, it is such a great relief (forgive) by others. 【答案】to be forgiven 【详解】考查非谓语动词。句意：对于这个犯了严重错误的人来说，被别人原谅是一种极大的解脱。“it is + n. + to do sth.”的固定句型，其中it是形式主语，真正的主语是后面的动词不定式，且forgive(原谅)与其逻辑主语this person之间是被动关系，用动词不定式的被动形式to be forgiven作主语。故填to be forgiven。 40．It is indeed an honor for China’s scientific research and Chinese medicine (spread) around the world. 【答案】to be spread 【详解】考查非谓语动词。句意：中国的科学研究和中医药被传播到世界各地，这确实是一种荣誉。本句使用“It is + 名词 + for sth. to do sth.”的固定句型，It为形式主语，本空用不定式，作真正的主语；且“China’s scientific research and Chinese medicine”与spread“传播”之间是被动关系，用不定式的被动形式to be spread。故填to be spread。 二、完成句子 41．In such things it’s always good . 处理这样的事情总以稳重为好。 【答案】to play safe 【详解】考查固定短语和动词不定式。根据句意，“以稳重为好”核心是表达“采取稳妥的做法”，使用固定短语play safe，句子结构为“It’s + adj. + to do sth.”，其中it为形式主语，真正主语需用动词不定式，play safe前需加不定式符号“to”。故填to play safe。 42．It will be my honour ! 为您服务是我的荣耀! 【答案】to serve you 【详解】考查不定式。对比中英文句子可知，空格处意为“为您服务”，是serve you，It is one’s honour to do sth.是固定句型，意为“做某事是某人的荣耀”，其中it是形式主语，真正的主语是不定式，因此空格处是to serve you。故填to serve you。 43．It is necessary . 掌握一门外语是必要的。 【答案】to master a foreign language 【详解】考查非谓语动词。根据中文提示，句子使用句型It is necessary to do sth.，其中it作形式主语，动词不定式作真正的主语。“掌握一门外语”为master a foreign language，放在动词不定式符号to后用动词原形。故填to master a foreign language。 44．When learning about a new topic, . 当学习一个新话题时，收集事实和数据是很重要的。 【答案】it is important to collect facts and figures 【详解】考查固定句型。根据句意，此处表示“收集事实和数据是很重要的”可以为“it作形式主语，不定式短语作真正主语”结构，表示“重要的”为形容词important作表语，结合句意，此处描述的是客观事实，所以be动词为is，表示“收集事实和数据”为collect facts and figures，用不定式形式作真正主语。故填it is important to collect facts and figures。 45． is foolish for Chinese people. 对中国人来说，庆祝外国节日是愚蠢的行为。 【答案】To celebrate foreign festivals/Celebrating foreign festivals 【详解】考查非谓语动词。“庆祝外国节日”翻译为celebrate foreign festivals；空格处作主语应该用不定式或动名词形式。故填To celebrate foreign festivals/Celebrating foreign festivals。 46．It is not unusual for teenagers of your generation to to computer games and the online world. 你们这一代的青少年被电脑游戏和网络世界吸引, 这没有什么不正常。 【答案】 be attracted 【详解】考查固定短语。根据句意可知，句中涉及固定短语“be attracted to”，意为“被……所吸引”，句中“It”为形式主语，不定式作真正的主语，不定式符号“to”后接动词原形。故填be attracted。 47．To fully realize your potential, it is important for you to our school resources. 要想全面发挥自己的潜能，充分利用我们学校的资源很重要。 【答案】 make the most of 【详解】考查动词短语。空处表示“充分利用”，使用动词短语make the most of，空前的to是不定式符号，后接动词原形，不定式作真正的主语，it是形式主语。故填①make②the③most④of。 48．It's easy for you to yourself and the world around you. 你很容易对自己和周围的世界满足。 【答案】feel content with 【详解】考查固定短语。短语feel content with“对……感到满意”，符合句意，接在不定式to后，应用动词原形，故填feel content with。 49． , saving lives is of paramount importance, so it is vital . 毕竟，拯救生命是首要的，作好充足的准备工作至关重要。 【答案】 After all to make sufficient preparations 【详解】考查固定搭配和不定式。分析句子可知，表示“毕竟”应用after all，为固定搭配，在本句中作状语，且句首时首字母应大写；表示“作好充足的准备工作”应用make sufficient preparations，再分析句子可知，这里应用不定式作逻辑主语。故填After all；to make sufficient preparations。 50．We think the orphans. 我们认为照顾这些孤儿是我们的职责。 【答案】it is our duty to take care of 【详解】考查句子结构。根据句意和前文think可知，宾语从句中描述现实情况，用一般现在时。表示“照顾这些孤儿”可用动词不定式短语to take care of the orphans，作真正主语；it作形式主语，系动词用is。故填it is our duty to take care of。 试卷第1页，共3页 试卷第1页，共3页 学科网（北京）股份有限公司 $