人教版（2019）必修第三册：Unit 4 Space exploration Discovering Useful Structures 学案（含答案）
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| 名称 | 人教版（2019）必修第三册：Unit 4 Space exploration Discovering Useful Structures 学案（含答案） |  | |
| 格式 | docx | ||
| 文件大小 | 22.2KB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2022-12-28 20:43:20 | ||
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文档简介
Unit 4 Space exploration
Section B Discovering Useful Structures
一、语法点拨
动词不定式作定语和状语
（一）、动词不定式作状语
动词不定式作状语通常表目的、结果、原因等。
a.表目的
They ran over to welcome the delegates.他们跑过去欢迎代表们。
He stood up to be seen better.他站起来以让别人看得更清楚。
b. 表结果
What have I said to make you so angry？
我说了什么让你这么生气？
He came round to find himself in hospital.
他苏醒过来发现自己住院了。
c. 表原因
不定式表示原因时般放在句子的末尾，说明主语产生某种情感（glad pleased、sad、worried、sad excited）的原因。如：
I'm very glad to hear that Li Lei has been elected secretary of the Party.
听说李蕾被选为了党委书记，我很高兴。
d. 作评论性状语
有些不定式用于修饰整个句子，表明说话者的观点或态度，我们称之为评论性状语。
To be honest，I don't like her.说实话，我不喜欢她。
（二）、动词不定式作定语
动词不定式作定语常用来修饰名词或不定代词，放在所修饰的词的后面。作后置定语。如：
Who was the first one to arrive？谁第一个到的？
The best way to learn English is to use it.学英语最好的方法是使用它。
When is the best time to plant vegetables？什么时候是种植蔬菜的最好时间？
①动词不定式作定语，它与所修饰的名词或代词可能是主动关系，也可能是被动关系。如果是被动关系，且句中含有不定式动作的执行者时，不定式要用主动表示被动。
He was the last one to leave school yesterday.
他是昨天最后一个离开学校的人。
We have much homework to do everyday.
我们每天有很多家庭作业要做。
②动词不定式（短语）作定语修饰名词且与其所修饰的词之间为被动关系时，如果不定式中的动词为不及物动词，那么其后应加上一个含义上所需要的介词。如：
I have no chair to sit on.我没有椅子坐。
He has no house to live in，他没有房子住。
二、同步练习
1.Scientists have warned that coral reefs are likely to become the world’s first ecosystem ___________( disappear) because of global warming.
2.While sleeping, astronauts must attach themselves to something to prevent _________(float) around.
3.She solved the problem in an ________(intelligence) way.
4.Yet, they are not as ______________(universe) as we think.
5.What can go around the earth without ___________(rocket)
6.John Glenn, the American who first ______________(orbit) the Earth，was welcomed with 3,529 tonnes of ticker tape when he got back.
7.But I want to be strong and _____________(independence) one day.
8.Keeping your __________(muscle) strong helps you to avoid back problems.
9.He _____________(leap) forward and caught the ball.
10.At the sound of a knock at the door, I rushed out immediately, only __________(find) nobody in sight.
答案以及解析
1.答案：to disappear
解析：句意为:科学家警告说,由于全球变暖,珊瑚礁很可能成为世界上第一个消失的生态系统。被修饰词前有序数词first修饰,应用不定式作后置定语。故填to disappear。
2.答案：floating
3.答案：intelligent
4.答案：universal
5.答案：rockets
6.答案：orbited
7.答案：independent
8.答案：muscles
9.答案：leaped
10.答案：to find
Section B Discovering Useful Structures
一、语法点拨
动词不定式作定语和状语
（一）、动词不定式作状语
动词不定式作状语通常表目的、结果、原因等。
a.表目的
They ran over to welcome the delegates.他们跑过去欢迎代表们。
He stood up to be seen better.他站起来以让别人看得更清楚。
b. 表结果
What have I said to make you so angry？
我说了什么让你这么生气？
He came round to find himself in hospital.
他苏醒过来发现自己住院了。
c. 表原因
不定式表示原因时般放在句子的末尾，说明主语产生某种情感（glad pleased、sad、worried、sad excited）的原因。如：
I'm very glad to hear that Li Lei has been elected secretary of the Party.
听说李蕾被选为了党委书记，我很高兴。
d. 作评论性状语
有些不定式用于修饰整个句子，表明说话者的观点或态度，我们称之为评论性状语。
To be honest，I don't like her.说实话，我不喜欢她。
（二）、动词不定式作定语
动词不定式作定语常用来修饰名词或不定代词，放在所修饰的词的后面。作后置定语。如：
Who was the first one to arrive？谁第一个到的？
The best way to learn English is to use it.学英语最好的方法是使用它。
When is the best time to plant vegetables？什么时候是种植蔬菜的最好时间？
①动词不定式作定语，它与所修饰的名词或代词可能是主动关系，也可能是被动关系。如果是被动关系，且句中含有不定式动作的执行者时，不定式要用主动表示被动。
He was the last one to leave school yesterday.
他是昨天最后一个离开学校的人。
We have much homework to do everyday.
我们每天有很多家庭作业要做。
②动词不定式（短语）作定语修饰名词且与其所修饰的词之间为被动关系时，如果不定式中的动词为不及物动词，那么其后应加上一个含义上所需要的介词。如：
I have no chair to sit on.我没有椅子坐。
He has no house to live in，他没有房子住。
二、同步练习
1.Scientists have warned that coral reefs are likely to become the world’s first ecosystem ___________( disappear) because of global warming.
2.While sleeping, astronauts must attach themselves to something to prevent _________(float) around.
3.She solved the problem in an ________(intelligence) way.
4.Yet, they are not as ______________(universe) as we think.
5.What can go around the earth without ___________(rocket)
6.John Glenn, the American who first ______________(orbit) the Earth，was welcomed with 3,529 tonnes of ticker tape when he got back.
7.But I want to be strong and _____________(independence) one day.
8.Keeping your __________(muscle) strong helps you to avoid back problems.
9.He _____________(leap) forward and caught the ball.
10.At the sound of a knock at the door, I rushed out immediately, only __________(find) nobody in sight.
答案以及解析
1.答案：to disappear
解析：句意为:科学家警告说,由于全球变暖,珊瑚礁很可能成为世界上第一个消失的生态系统。被修饰词前有序数词first修饰,应用不定式作后置定语。故填to disappear。
2.答案：floating
3.答案：intelligent
4.答案：universal
5.答案：rockets
6.答案：orbited
7.答案：independent
8.答案：muscles
9.答案：leaped
10.答案：to find