Unit 2 Healthy Lifestyle 单元语法 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．It’s not easy work (organize) such a well-prepared exhibition. 【答案】to organize 【详解】考查非谓语动词。句意：组织一场准备如此充分的展览并非易事。本句为It作形式主语的固定句型“It’s +形容词 + to do sth.”，真正的主语是后面的不定式。故填to organize。 2． (ignore) the difference between the two research findings will be one of the worst mistakes you have made. 【答案】To ignore/Ignoring 【详解】考查非谓语动词。句意：忽视这两项研究结果之间的差异将是你犯的最严重的错误之一。本空在句中作主语，且表示一种一般性的行为，所以用动名词形式ignoring，作主语，位于句首，首字母大写。也可以表示具体的、将要发生的动作，用不定式。故填To ignore/Ignoring。 3．It is difficult (write) the composition in an hour. 【答案】to write 主语 【详解】考查非谓语动词。句意：一小时内写这篇作文很难。本句使用固定句型“It is +形容词+ to do sth.”，其中it是形式主语，使用动词不定式形式，作真正的主语。故答案为：to write 主语。 4．It takes time and effort (develop) a good habit like reading every day. 【答案】to develop 【详解】考查非谓语动词。句意：养成像每天阅读这样的好习惯需要时间和努力。“It takes + 时间/金钱 + to do sth”为固定句型，表示“做某事需要花费……（时间/金钱）”，it为形式主语，真正的主语是动词不定式。故填to develop。 5．It took them a long time (arrange) the details of the trip. 【答案】to arrange 【详解】考查非谓语动词。句意：他们花了很长时间来安排旅行的细节。“it takes sb. some time to do sth.”是固定句型，表示“做某事花费某人多长时间”，其中it是形式主语，真正的主语是后面的动词不定式，所以此处应用动词arrange“安排”的不定式形式，作主语。故填to arrange。 6．It’s difficult (compare) these two paintings as they are both excellent. 【答案】to compare 【详解】考查非谓语动词。句意：这两幅画都很好，很难比较。It’s difficult to do sth.是固定句型，意为“做某事很困难”，其中it是形式主语，真正的主语是动词不定式，因此空格处是不定式to compare。故填to compare。 7．I began to think how amazing a thing it was (die) in such a way, and how wonderful it was to see the power of nature. 【答案】to die 【详解】考查非谓语动词。句意：我开始思考以这样的方式死去是多么惊人的事情，以及看到自然的力量是多么美妙。在本句中，“it”是形式主语，动词不定式在此处用来表达一个具体的动作或事件，在本句中为真正主语。因此，应使用die的不定式形式to die。故填to die。 8．It took them a while (figure) out the best way to organize the festival's events. 【答案】to figure 【详解】考查非谓语动词。句意：他们花了一段时间才弄清楚组织节日活动的最佳方式。本题考查固定句型“It takes/took sb.+时间+to do sth.”，意为“花费某人多少时间做某事”，it为形式主语，动词不定式为真正的主语。故填to figure。 9．It is very hard (learn) an art well. 【答案】to learn 【详解】考查非谓语动词。句意：学好一门艺术很难。句首It为形式主语，空处应用动词不定式形式作真正的主语。故填to learn。 10．To understand culture shock, it is vital (make) sense of what culture is. 【答案】to make 【详解】考查非谓语动词。句意：要理解文化冲击，理解什么是文化至关重要。it is vital to do sth.为固定句型，it作形式主语，不定式作真正主语，意为“做某事至关重要”。故填to make。 11．It is impossible (deliver) this letter because the address is illegible. 【答案】to deliver 【详解】考查非谓语动词。句意：这封信无法投递，因为地址难以辨认。根据“It is impossible”可知，此处用固定句型“it is+形容词+to do sth.”表示“做某事……”，其中it作形式主语，真正的主语是后面的不定式，因此用deliver“投递”的不定式形式。故填to deliver。 12．It is difficult for us (finish) the work in an hour. 【答案】to finish 【详解】考查固定句式。句意：我们难以在一个小时内完成这项工作。此处考查“It is+adj.+for sb.+to do sth.”句式，其中It是形式主语，动词不定式是真正的主语。故填to finish。 13．He said it was impossible for there (be) a mistake in a computer’s calculation, so you can rely on that. 【答案】to be 【详解】考查非谓语动词。句意为：他说电脑计算不可能存在错误，因此你可以相信这一点。句型“It is+ adj.+ for +there+ to be”，不定式作真正主语，故填to be。 14．It is not a good idea for people (focus) only on themselves. 【答案】to focus 【详解】考查非谓语动词。句意：人们只关注自己并不是一个好主意。It is +adj.+n+for sb+to do...为固定句型，it为形式主语，空处需填动词不定式作真正的主语。故填to focus。 15．It is necessary for young students (learn) to learn a foreign language. 【答案】to learn 【详解】考查不定式。句意：年轻学生学习一门外语是必要的。这是It is+adj.+for sb. to do sth.结构，it作形式主语，不定式短语是真正主语，learn用不定式形式。故填to learn。 16．It is worthwhile (prepare) for the worst conditions we might meet. 【答案】to prepare/preparing 【详解】考查固定搭配。句意：为我们可能遇到的最坏情况做好准备是值得的。由句意及空前的It is worthwhile应填to prepare/prearing，It is worthwhile to do/doing...“做某事是值得的”，其中it为形式主语，不定式或动名词作真正的主语。故答案为to prepare/preparing。 17． (stay) calm when we are faced with trouble is very difficult. 【答案】To stay 【详解】考查非谓语动词。句意：当我们面对困难时保持镇定是很困难的。空处作主语，强调动作，应用动词不定式，句首单词的首字母应大写，故填To stay。 18．Although sometimes it may seem impossible (get) along as a family, you can take action to improve the situation. 【答案】to get 【详解】考查非谓语动词。句意：虽然有时候一家人好好相处似乎不太可能，但你可以采取行动来改善这种情况。分析句子结构，it在句中作形式主语，表语为impossible，所以应用不定式作真正主语。故填to get。 19．It’s impossible (anticipate) when the disease will break out. 【答案】to anticipate 【详解】考查不定式。句意：预料这种病什么时候发作是不可能的。分析句子可知，设空处构成不定式充当句子真正主语。故填to anticipate。 20．It doesn't make sense (buy) such a cheap computer just to save a few dollars. 【答案】to buy 【详解】考查非谓语动词。句意：为了省几美元而买这么便宜的电脑是没有道理的。句中it为形式主语，真正的主语为to do不定式结构，故填to buy。 21．It is important for us (master) the computer skills. 【答案】to master 【详解】考查非谓语动词。句意：掌握计算机技术对我们来说很重要。分析句子可知，It为形式主语，空处为句子真正的主语，此处用动词不定式to master，构成It’s+adj.+for sb.+to do sth.句型。故填to master。 22．For us students, it’s never too early (make) necessary preparations for a meaningful college experience. 【答案】to make 【详解】考查动词不定式。句意：对于我们学生来说，为有意义的大学生活做必要的准备永远不会太早。分析句子可知，此处为固定句型it is never too early to do sth...“做什么从来不算早”，其中it为形式主语，动词不定式to do作真正的主语。故填to make。 23．In my opinion, it is very important (bridge) the digital divide and make sure everyone has access to the Internet. 【答案】to bridge 【详解】考查不定式作主语。句意：在我看来，弥合数字鸿沟并确保每个人都可以访问互联网很重要。分析句子，本句使用了it作形式主语的句式：It is+ 形容词+ to do sth.，it为形式主语，真正的主语为不定式短语。结合句中英文提示，故填to bridge。 24．It is important for people (master) at least one foreign language in modern society. 【答案】to master 【详解】考查非谓语动词。句意：在现代社会，对人们来说至少掌握一门外语是重要的。分析句子结构可知，此处是It is ＋adj. ＋for sb. to do sth.固定句型，其中It是形式主语，真正的主语是不定式。故填to master。 25．People find that it is convenient (pay) a bill by mobile. 【答案】to pay 【详解】考查不定式。句意：人们发现用手机支付账单很方便。it is convenient to do sth.“做某事是方便的”为固定用法，it是形式主语，不定式用作真正的主语。故填to pay。 26．It’s also important for parents (know) which apps their children are using. 【答案】to know 【详解】考查固定句型。句意：对于父母来说，知道他们的孩子正在使用哪些应用程序也非常重要。此处考查句型“it is+adj+for sb to do sth”，表示“对某人来说做某事是……的”，it为形式主语，空处应用动词不定式，动词不定式短语作真正的主语。故填to know。 27．I still remember how long it took (polish) the legs of our coffee table. 【答案】to polish 【详解】考查非谓语动词。句意：我还记得我们擦咖啡桌腿花了多长时间。it took some time to do sth.为固定短语，意为“花费时间做某事”，其中it为形式主语，空格处应用动词不定式作真正的主语。故填to polish。 28．It takes me a long time (finish) to project so that I feel too tired to walk any further. 【答案】to finish 【详解】考查动词不定式。句意：我花了很长时间才完成这个项目，以至于我累得走不动了。“it takes sb some time to do sth”为固定句型，意为“花费某人多长时间去做某事”，it是形式主语，动词不定式是真正的主语，故填to finish。 29．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。 30．It is essential (integrate) the kids with the community as well as finding them a suitable role. 【答案】to integrate 【详解】考查非谓语动词。 句意：让孩子融入社区，并为他们找到合适的角色，这是至关重要的。It is essential  to do sth.“做某事是至关重要的”，分析句子成分可知，It作形式主语，不定式短语作真正的主语。根据句意，故填to integrate。 二、完成句子 31．_________ scold your son before you know the fact. 在没弄清事实之前就责备儿子，那就是你的过错了。 【答案】It’s your fault to 【详解】考查固定句型和非谓语动词。根据句意，此处表示“做某事是某人的过错”需用固定句型It’s one’s fault to do sth.，其中it为形式主语，不定式短语作真正主语，句首单词首字母大写。故填It’s your fault to。 32．No matter how bright a talker you are, there are times when it’s better ________. 不论你多么能说会道，有些时候保持沉默会更好。 【答案】to remain silent 【详解】考查非谓语动词。it’s better to do sth.是固定句型，意为“做某事会更好”，其中不定式作真正的主语，it是形式主语。表示“保持沉默”用remain silent，用不定式，作真正的主语。故填to remain silent。 33．____________________________________ her all alone in that big house. 想到她孤身一人守着那所大房子我都难受。 【答案】It upsets me to think of 【详解】考查固定句型和动词短语。根据句意，此处需表达“想到……我都难受”，可用固定句型“It upsets sb. to do sth.”（做某事使某人难受），其中it为形式主语，真正主语是后面的不定式短语；“我”用宾格“me”，“难受”用动词upset，描述客观感受，用一般现在时，it作主语，谓语动词用第三人称单数形式，“想到”译为think of。故填It upsets me to think of。 34．________________ some fruit when you go to your Chinese friend’s home for dinner. 当你去中国朋友家吃饭时，带些水果是合适的。 【答案】It is suitable to carry 【详解】考查固定句型和固定短语。根据句意，此处为固定句型“it be +形容词+ to do sth.”，其中it为形式主语，真正主语是后面的不定式短语，表示“合适的”用形容词suitable作表语，“带些水果”为carry some fruit，句子描述客观建议，用一般现在时，it作主语，be动词用is，位于句首单词首字母需大写。故填It is suitable to carry。 35．It’s illegal to ________________ to get profits for himself. 他滥用职权徇私谋利是违法的。 【答案】abuse his power 【详解】考查固定句型和动词。空处涉及固定句型“It is+adj.+to do sth.”表示“做某事是……的”，其中it是形式主语，不定式是真正的主语，“滥用”表达为动词abuse，用其原形和to构成不定式，句中“职权”是指“他的职权”，表达为his power作宾语。综上，故填abuse his power。 36．________________ that she is safe. 知道她安然无恙是令人宽慰的事。 【答案】It's a comfort to know 【详解】考查it作形式主语。“令人宽慰的事”表达为a comfort ，“知道”是know。此句用it作形式主语，真正的主语是后面的动词不定式to know that she is safe，这样避免句子头重脚轻，故译为It's a comfort to know。 37．It took ________________ these energy-saving houses. 建造这些节能建筑不仅仅需要建筑材料。 【答案】more than building supplies to construct 【详解】考查固定短语和非谓语动词。“It take...to do…”是固定句型，意为“做……需要……”，其中It是形式主语，真正的主语是不定式短语，“建造这些节能建筑”作主语，用不定式短语“to construct these energy saving houses”；宾语“建筑材料”，用名词词组building supplies；“不仅仅”作定语，用固定短语more than。故填more than building supplies to construct。 38．______ the patients with virus to the hospital at once. 把病毒感染者立刻送到医院是至关重要的。 【答案】It is vital to get 【详解】考查it作形式主语、不定式作真正的主语。表示“做某事是重要的”应用It is vital to do sth，其中it作形式主语、不定式作真正主语的结构，故答案为It is vital to get。 39．It is hard _________ while other children are playing. 当别的孩子在玩耍时，很难想象一个学生能把精力集中在教科书上。 【答案】to imagine a student focusing his attention on the textbook 【详解】考查动词、名词和短语。根据英汉意思对比可知，空处应填“想象一个学生能把精力集中在教科书上”，“想象”应用动词imagine；“一个学生”应用名词a student，作宾语；“把某人的精力集中于”应用动词短语focus one’s attention on，固定短语“想象某人做某事”英文表达为imagine sb. doing sth.，所以focus应变成focusing，one’s跟随逻辑主语a student可变成his；“教科书”应用名词the textbook，做介词宾语。“It is hard…”是It作形式主语的结构，真正的主语是后面的动词不定式to。故填to imagine a student focusing his attention on the textbook。 40．How was it possible __________________________________? 怎么可能在一周内完成这项任务？ 【答案】to finish this task in a week 【详解】考查动词不定式、名词。表示“完成”用动词finish，空前的it为形式主语，本空用finish的不定式，作真正的主语。表示“这项任务”用this task，作finish的宾语。表示“一周内”用in a week，作时间状语。故填to finish this task in a week。 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．It’s not easy work (organize) such a well-prepared exhibition. 2． (ignore) the difference between the two research findings will be one of the worst mistakes you have made. 3．It is difficult (write) the composition in an hour. 4．It takes time and effort (develop) a good habit like reading every day. 5．It took them a long time (arrange) the details of the trip. 6．It’s difficult (compare) these two paintings as they are both excellent. 7．I began to think how amazing a thing it was (die) in such a way, and how wonderful it was to see the power of nature. 8．It took them a while (figure) out the best way to organize the festival's events. 9．It is very hard (learn) an art well. 10．To understand culture shock, it is vital (make) sense of what culture is. 11．It is impossible (deliver) this letter because the address is illegible. 12．It is difficult for us (finish) the work in an hour. 13．He said it was impossible for there (be) a mistake in a computer’s calculation, so you can rely on that. 14．It is not a good idea for people (focus) only on themselves. 15．It is necessary for young students (learn) to learn a foreign language. 16．It is worthwhile (prepare) for the worst conditions we might meet. 17． (stay) calm when we are faced with trouble is very difficult. 18．Although sometimes it may seem impossible (get) along as a family, you can take action to improve the situation. 19．It’s impossible (anticipate) when the disease will break out. 20．It doesn't make sense (buy) such a cheap computer just to save a few dollars. 21．It is important for us (master) the computer skills. 22．For us students, it’s never too early (make) necessary preparations for a meaningful college experience. 23．In my opinion, it is very important (bridge) the digital divide and make sure everyone has access to the Internet. 24．It is important for people (master) at least one foreign language in modern society. 25．People find that it is convenient (pay) a bill by mobile. 26．It’s also important for parents (know) which apps their children are using. 27．I still remember how long it took (polish) the legs of our coffee table. 28．It takes me a long time (finish) to project so that I feel too tired to walk any further. 29．It is crucial (step) up international cooperation to minimize the COVID-19’s impact on economic growth. 30．It is essential (integrate) the kids with the community as well as finding them a suitable role. 二、完成句子 31．_________ scold your son before you know the fact. 在没弄清事实之前就责备儿子，那就是你的过错了。 32．No matter how bright a talker you are, there are times when it’s better ________. 不论你多么能说会道，有些时候保持沉默会更好。 33．____________________________________ her all alone in that big house. 想到她孤身一人守着那所大房子我都难受。 34．________________ some fruit when you go to your Chinese friend’s home for dinner. 当你去中国朋友家吃饭时，带些水果是合适的。 35．It’s illegal to ________________ to get profits for himself. 他滥用职权徇私谋利是违法的。 36．________________ that she is safe. 知道她安然无恙是令人宽慰的事。 37．It took ________________ these energy-saving houses. 建造这些节能建筑不仅仅需要建筑材料。 38．______ the patients with virus to the hospital at once. 把病毒感染者立刻送到医院是至关重要的。 39．It is hard _________ while other children are playing. 当别的孩子在玩耍时，很难想象一个学生能把精力集中在教科书上。 40．How was it possible __________________________________? 怎么可能在一周内完成这项任务？ 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 $