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◆ 动词不定式形式
动词不定式(the Infinitive)是一个非谓语动词, 由“to+ 动词原形”组成, 其否定式是“not to+ 动词原形”。动词不定式即使不能作谓语动词,但仍保留动词特征,它能够有自己宾语或状语而组成动词不定式短语。如to study hard, to play basketball。
Grammar
第1页
动词不定式
◆动词不定式时态和语态
主动形式
被动形式
普通式
to do
to be done
完成式
to have done
to have been done
进行式
to be doing
—————
完成进行式
to have being doing
—————
时态
语态
Grammar
第2页
动词不定式
◆动词不定式时态和语态
1. Kate hopes to become a university student this year.
凯特希望今年能成为一名大学生。
2. I’m sorry to have kept you waiting.
很抱歉让你久等了。
3. They seemed to be discussing something important.
他们似乎正在讨论主要事情。
4. She wishes to be sent to work in Shanghai.
她希望能被派到上海工作。
Examples:
Grammar
第3页
动词不定式
◆动词不定式句法功效
1.作主语
To talk with him is a great pleasure.
注意:动词不定式短语作主语时,为了保持句子平衡,往往用it作形式主语,而把不定式短语置于谓语动词之后。
如:
It is a great pleasure to talk with him.
It is a great pleasure to see you again.
Grammar
第4页
动词不定式
◆动词不定式句法功效
3.作宾语
(1)有些及物动词惯用动词不定式作宾语。这些动词有:ask, want, try, hope, wish, learn, choose, decide, expect, afford等。
如:
Lucy wants to buy a computer.
We can’t afford to go on vacation this year.
2.作表语
His wish is to become a basketball star like Yao Ming.
Grammar
第5页
动词不定式
◆动词不定式句法功效
3.作宾语
(2)不定式短语作宾语时,假如还带有宾语补足语,往往把不定式宾语放在宾语补足语之后,而用it作形式宾语。
如:I find it interesting to study yoga.
Grammar
第6页
动词不定式
◆动词不定式句法功效
4.作复合宾语中宾语补足语
常跟不定式作宾补动词有:ask, invite, help, tell, hear,make等。
如:
I invited her to have coffee.
Tell the children not to play on the street.
Grammar
第7页
动词不定式
◆动词不定式句法功效
4.作复合宾语中宾语补足语
注:(1)在feel, hear, see, watch, notice等感官动词或let, make, have等使役动词后面,复合宾语中动词不定式通常不带to。但上述动词转换为被动结构时,
其后不定式仍须带to。
如:
We often hear him sing in the room.
He was seen to enter the theatre.
Grammar
第8页
动词不定式
◆动词不定式句法功效
5.作定语
动词不定式可用作修饰名词或代词定语,用作定语不定式需跟在所修饰名词或代词之后。
如:
We need someone to help him with the typing.
She is a very nice person to work with.
Grammar
第9页
动词不定式
◆动词不定式句法功效
6.作状语
动词不定式可用作修饰动词或形容词状语,通常放在
其修饰动词或形容词之后。如:
(1) The young often come here to listen to the old man
tell stories. (作目标状语)
(2) Everyone will be surprised to see the changes in Beijing. (作原因状语)
(3)The hall is big enough to hold a lot of people.
(作结果状语)
Grammar
第10页
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