内容正文:
Unit7 Section A 3a~4c知识点
一、祈使句:表示请求、命令、建议的句子。
Be happy! 开心点。 Stand up! 站起来。
祈使句的否定,前面加Don’t
Don't be late! 别迟到. Don't stand up! 别站起来
祈使句的特点:
1、动词原形开头
2、省略主语you(你、你们)
3、否定加Don't
二、不定式: to do sth
不定式:有3种身份:名词、形容词、副词
肯定结构: to do~ (to + 动词原形)
否定结构: not to do~
1、做名词
To clean my room takes me two hours. 不定式做主语
I want to read books. 不定式做宾语
His dream is to be a teacher. 不定式做表语
2、做形容词: ……的, 放名词后。
I have something to eat.
I have nothing to do.
It is a good place to have fun.
It is a good place to buy things.
3、做副词: 放句子前面或后面(为了,因为)
I am happy to meet you. 因为
I went there to read book. 为了
I come here to buy clothes. 为了
三、介词短语
1、介词+名词/动词ing(这种搭配叫做介词短语)
2、介词短语用法:有两个。
做形容词,修饰名词,放名词后。
做副词, 放在句子最前面或最后面。
1、介词短语 做 形容词
The boy in Beijing is a good student.
在北京的。 修饰男孩
The girl from America is 11 years old.
来自美国的, 修饰女孩
注意:介词短语作形容词,修饰名词,要放在名词的后面。
2、介词短语 做 副词 。
表示时间、地点、方式等。
He goes to school at 10: