U2 Healthy lifestyle to do 作主语 学案 选必三 （含答案）
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| 名称 | U2 Healthy lifestyle to do 作主语 学案 选必三 （含答案） |
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| 格式 | doc | ||
| 文件大小 | 354.4KB | ||
| 资源类型 | 试卷 | ||
| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2026-03-01 00:00:00 | ||
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/ 让教学更有效 高效备考 | 英语学科
to do 作主语学案(选必三U2 Healthy lifestyle)
教学重点 · 核心结构：to do 作主语表具体 / 将来 / 目的性动作，谓语动词用单数；· 形式主语用法：不定式短语较长时，用it 作形式主语，将 to do 后置，掌握 5 类常用句式；· 否定形式：not to do，否定词置于不定式前；· 特殊结构：疑问词 + to do构成名词性短语作主语；· 核心区分：to do 作主语表具体 / 将来动作，doing 作主语表抽象 / 习惯性动作；· 固定搭配：熟记 It takes sb. time to do、It is + adj. + for/of sb. to do 等句式。
教学难点 · 精准判断it 作形式主语的适用场景，避免直接用长不定式短语作主语导致头重脚轻；· 区分for sb. 和 of sb. 的用法（of 接描述人品质的形容词，for 接描述事物性质的形容词）；· 语境中灵活选择to do 和 doing作主语，准确判断动作是具体 / 将来还是抽象 / 习惯性。
一、核心概念
动词不定式作主语，指to + 动词原形的结构在句中充当主语，表达具体动作、目的或未发生的行为。
例：To learn English well is important.（学好英语很重要）
二、注意事项
1. 谓语动词用单数：不定式作主语时，谓语动词需用单数形式。
例：To finish the task in time is our goal.
2. 避免头重脚轻：当不定式短语较长时，用 it 作形式主语，将真正的不定式主语后置。
例：It is necessary to take notes in class.
3. 否定形式：不定式的否定形式为 not to do 。
例：Not to follow the rules will cause trouble.
4. 与现在分词的区别：不定式表具体/将来动作，现在分词（doing）表抽象/习惯性动作。
例：Swimming is my hobby.
三、疑问词+to do构成的短语作主语
疑问词（what, which, how, where, when等）+不定式可构成名词性短语，在句中作主语。
- How to solve the problem is still unknown.
- What to do next depends on your decision.
四、it作形式主语的常用句式
1. It is + 形容词 + to do sth.
- It is important to learn English well. 学好英语很重要。
2. It is + 名词 + to do sth.
- It is a good habit to get up early. 早起是个好习惯。
3. It takes (sb.) + 时间 + to do sth.
- It took me two hours to finish the work. 我花了两小时完成这项工作。
4. It is + 形容词 + for sb. to do sth.(for接描述事物性质的形容词)
- It is easy for me to answer this question. 对我来说回答这个问题很容易。
5. It is + 形容词 + of sb. to do sth.(of接描述人品质的形容词)
- It is kind of you to help me. 你真好，帮了我。
一、基础填空题
用所给词的适当形式填空 （穿插分词）
1. ____________ (learn) a foreign language requires patience.
2. It is important ____________ (keep) calm in an emergency.
3. ____________ (swim) in the lake is dangerous.
4. How ____________ (improve) my writing skills is my biggest concern.
5. It took her three hours ____________ (prepare) for the party.
6. ____________ (not give) up is the key to success.
7. What ____________ (do) next is still under discussion.
8. ____________ (read) aloud every morning helps with pronunciation.
9. It is necessary ____________ (obey) the school rules.
10. ____________ (wait) for others makes me angry.
二、提升填空题
用所给词的适当形式填空 （穿插分词）
1. ____________ (master) a skill takes time and effort.
2. It is no use ____________ (cry) over spilt milk.
3. How ____________ (balance) work and life is a common problem.
4. It is kind of you ____________ (help) the elderly.
5. ____________ (win) the competition requires hard training.
6. ____________ (watch) too much TV is bad for eyes.
7. What ____________ (choose) is a difficult decision.
8. It is impossible ____________ (finish) the work in one day.
9. ____________ (not attend) the meeting will make the boss angry.
10. ____________ (run) every morning is good for health.
三、翻译题
1. 学好数学对我们来说很重要。
____________________________________________________________________________________
2. 如何解决这个问题还没有确定。
____________________________________________________________________________________
3.放弃不是一个好选择。
____________________________________________________________________________________
4. 每天锻炼有助于保持健康。
____________________________________________________________________________________
5. 按时完成作业是学生的责任。
____________________________________________________________________________________
四、高考真题精选
1. ____________ (respect) others is to respect oneself.（2021 全国卷）
2. It is no good ____________ (complain) without taking action.（2020 江苏卷）
3. ____________ (learn) a foreign language well, we need to practice more.（2019 浙江卷）
4. It is necessary ____________ (protect) the environment.（2022 山东卷）
5. What ____________ (do) next is still a question.（2023 全国卷）
6. ____________ (read) more books can broaden our horizons.（2021 天津卷）
7. It took him a year ____________ (write) the book.（2020 全国卷）
8. ____________ (succeed), we must work hard.（2022 浙江卷）
9. It is a pleasure ____________ (help) others.（2023 江苏卷）
10. ____________ (listen) to music can help us relax.（2021 山东卷）
参考答案
（一）基础填空题
1. To learn(偏正式、书面，多用于议论文、学术句子)/Learning(更自然、常用、口语化)
2. to keep
3. Swimming
4. to improve
5. to prepare
6. Not to give
7. to do
8. Reading
9. to obey
10. Waiting
（二）提升填空题
1. Mastering
2. crying
3. to balance
4. to help
5. To win
6. Watching
7. to choose
8. to finish
9. Not to attend
10. Running
（三）翻译题
1. It is important for us to learn math well.
2. How to solve this problem hasn't been decided yet.
3. To give up is not a good choice.
4. Exercising every day helps keep healthy.
5. It is the students' duty to finish homework on time.
（四）高考真题填空题
1. To respect
2. complaining
3. To learn
4. to protect
5. to do
6. Reading
7. to write
8. To succeed
9. to help
10. Listening
目标导航
知识精炼
基础过关
能力提升
21世纪教育网 www.21cnjy.com 精品试卷·第 2 页 （共 2 页）
to do 作主语学案(选必三U2 Healthy lifestyle)
教学重点 · 核心结构：to do 作主语表具体 / 将来 / 目的性动作，谓语动词用单数；· 形式主语用法：不定式短语较长时，用it 作形式主语，将 to do 后置，掌握 5 类常用句式；· 否定形式：not to do，否定词置于不定式前；· 特殊结构：疑问词 + to do构成名词性短语作主语；· 核心区分：to do 作主语表具体 / 将来动作，doing 作主语表抽象 / 习惯性动作；· 固定搭配：熟记 It takes sb. time to do、It is + adj. + for/of sb. to do 等句式。
教学难点 · 精准判断it 作形式主语的适用场景，避免直接用长不定式短语作主语导致头重脚轻；· 区分for sb. 和 of sb. 的用法（of 接描述人品质的形容词，for 接描述事物性质的形容词）；· 语境中灵活选择to do 和 doing作主语，准确判断动作是具体 / 将来还是抽象 / 习惯性。
一、核心概念
动词不定式作主语，指to + 动词原形的结构在句中充当主语，表达具体动作、目的或未发生的行为。
例：To learn English well is important.（学好英语很重要）
二、注意事项
1. 谓语动词用单数：不定式作主语时，谓语动词需用单数形式。
例：To finish the task in time is our goal.
2. 避免头重脚轻：当不定式短语较长时，用 it 作形式主语，将真正的不定式主语后置。
例：It is necessary to take notes in class.
3. 否定形式：不定式的否定形式为 not to do 。
例：Not to follow the rules will cause trouble.
4. 与现在分词的区别：不定式表具体/将来动作，现在分词（doing）表抽象/习惯性动作。
例：Swimming is my hobby.
三、疑问词+to do构成的短语作主语
疑问词（what, which, how, where, when等）+不定式可构成名词性短语，在句中作主语。
- How to solve the problem is still unknown.
- What to do next depends on your decision.
四、it作形式主语的常用句式
1. It is + 形容词 + to do sth.
- It is important to learn English well. 学好英语很重要。
2. It is + 名词 + to do sth.
- It is a good habit to get up early. 早起是个好习惯。
3. It takes (sb.) + 时间 + to do sth.
- It took me two hours to finish the work. 我花了两小时完成这项工作。
4. It is + 形容词 + for sb. to do sth.(for接描述事物性质的形容词)
- It is easy for me to answer this question. 对我来说回答这个问题很容易。
5. It is + 形容词 + of sb. to do sth.(of接描述人品质的形容词)
- It is kind of you to help me. 你真好，帮了我。
一、基础填空题
用所给词的适当形式填空 （穿插分词）
1. ____________ (learn) a foreign language requires patience.
2. It is important ____________ (keep) calm in an emergency.
3. ____________ (swim) in the lake is dangerous.
4. How ____________ (improve) my writing skills is my biggest concern.
5. It took her three hours ____________ (prepare) for the party.
6. ____________ (not give) up is the key to success.
7. What ____________ (do) next is still under discussion.
8. ____________ (read) aloud every morning helps with pronunciation.
9. It is necessary ____________ (obey) the school rules.
10. ____________ (wait) for others makes me angry.
二、提升填空题
用所给词的适当形式填空 （穿插分词）
1. ____________ (master) a skill takes time and effort.
2. It is no use ____________ (cry) over spilt milk.
3. How ____________ (balance) work and life is a common problem.
4. It is kind of you ____________ (help) the elderly.
5. ____________ (win) the competition requires hard training.
6. ____________ (watch) too much TV is bad for eyes.
7. What ____________ (choose) is a difficult decision.
8. It is impossible ____________ (finish) the work in one day.
9. ____________ (not attend) the meeting will make the boss angry.
10. ____________ (run) every morning is good for health.
三、翻译题
1. 学好数学对我们来说很重要。
____________________________________________________________________________________
2. 如何解决这个问题还没有确定。
____________________________________________________________________________________
3.放弃不是一个好选择。
____________________________________________________________________________________
4. 每天锻炼有助于保持健康。
____________________________________________________________________________________
5. 按时完成作业是学生的责任。
____________________________________________________________________________________
四、高考真题精选
1. ____________ (respect) others is to respect oneself.（2021 全国卷）
2. It is no good ____________ (complain) without taking action.（2020 江苏卷）
3. ____________ (learn) a foreign language well, we need to practice more.（2019 浙江卷）
4. It is necessary ____________ (protect) the environment.（2022 山东卷）
5. What ____________ (do) next is still a question.（2023 全国卷）
6. ____________ (read) more books can broaden our horizons.（2021 天津卷）
7. It took him a year ____________ (write) the book.（2020 全国卷）
8. ____________ (succeed), we must work hard.（2022 浙江卷）
9. It is a pleasure ____________ (help) others.（2023 江苏卷）
10. ____________ (listen) to music can help us relax.（2021 山东卷）
参考答案
（一）基础填空题
1. To learn(偏正式、书面，多用于议论文、学术句子)/Learning(更自然、常用、口语化)
2. to keep
3. Swimming
4. to improve
5. to prepare
6. Not to give
7. to do
8. Reading
9. to obey
10. Waiting
（二）提升填空题
1. Mastering
2. crying
3. to balance
4. to help
5. To win
6. Watching
7. to choose
8. to finish
9. Not to attend
10. Running
（三）翻译题
1. It is important for us to learn math well.
2. How to solve this problem hasn't been decided yet.
3. To give up is not a good choice.
4. Exercising every day helps keep healthy.
5. It is the students' duty to finish homework on time.
（四）高考真题填空题
1. To respect
2. complaining
3. To learn
4. to protect
5. to do
6. Reading
7. to write
8. To succeed
9. to help
10. Listening
目标导航
知识精炼
基础过关
能力提升
21世纪教育网 www.21cnjy.com 精品试卷·第 2 页 （共 2 页）