1．动词不定式一般式表示的动作可能与谓语动词的动作同时发生,也可能在其之后发生.例如: saw the young man enter the house. I hope to go there ——青夏教育精英家教网—

1．动词不定式一般式表示的动作可能与谓语动词的动作同时发生,也可能在其之后发生。例如： saw the young man enter the house.(同时发生)

　 I hope to go there next time.(之后发生)

例1	________ is one thing, ________ is quite another.
	A．	To say, to do	B．	Say, do
C．	Said, did	D．	To say, do
答案：	A
提示：	用动词不定式作主语。
例2	I’ll try ________ the same mistakes again.
	A．	to not make	B．	not make
C．	not to make	D．	not making
答案：	C
提示：	动词不定式的否定形式为not to + 动词原形 “try not to do sth.”意思为“尽力不做某事”。
例3	It’s too hard ________ it by himself.
	A．	not to do	B．	to do
C．	that I do	D．	doing
答案：	B
提示：	“too … to”是太 …… 而不能的意思。
例4	I have nothing ___________ (send) you.
	答案：	to send
提示：	不定式短语to send you在这里做定语修饰nothing
例5	They were made ___________ (work) ten hours a day.
	答案：	to work
提示：	在主动语态中make要跟不带to的不定式作宾语补足语，但在被动语态中make后的不定式须带to
例6	No one knows what ___________ (do) next.
	答案：	to do
提示：	动词不定式和疑问词连用，构成动词不定式短语，在句中作宾语。

5．　完成的被动式to have been done

例如：The boy is said to have been sent to hospital yesterday.

第二节实战演练

4．　被动式to be done

例如：The work is to be done soon.

3．　完成式to have done

例如：He seemed to have cleaned the room.

2．　进行式to be doing

例如：He seems to be reading something at that time.

动词不定式是非谓语动词的一种，有不定式符号(to)加动词原形构成。不定式的形式有五种：

1．　一般式to do

例如：I like to read English.

4.动词不定式与疑问词连用

疑问词who, what, which和疑问副词when, where, how, why等后面可以按动词不定式，构成动词不定式短语，可以在句子中作主语、宾语、表语等成分。

例如：(1) He doesn’t know how to use the machine.

　　　　　　　　　　　　　　　　　　　　　 (不定式作宾语)

　　　　　　 (2) How to use the machine is a question.

　　　　　　　　　　 (不定式作主语)

　　　　　　 (3) The question is when to go there.

　　　　　　　　　　　　　 (不定式作表语)

3.动词不定式的否定形式

动词不定式的否定形式not + to + 动词原形构成

例如： He asked me not to make such a mistake.

6.　　　作状语

He stopped to have a look.

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