用所给动词的正确形式填空。1. If you want to learn English well, you should practise _________ (speak) English.2. I spend two hours _________(do) my homework.-七年级英语
动词不定式及其短语还可以有自己的宾语、状语,虽然动词不定式在语法上没有表面上的直接主语,但它表达的意义是动作,这一动作一定由使动者发出。
这一使动者我们称之为逻辑主语,其形式如下:
时态 | 主动形式 | 被动形式 |
一般式 | (not) to do | (not) to be done |
完成式 | (not) to have done | (not) to have been done |
进行式 | (not) to be doing | |
完成进行式 | (not) to have been doing |
1、不定式作主语
例如:To remember this is very important.
注意:为了避免头重脚轻,在许多情况下,通常都将作主语的不定式置于句子后部,而在句首主语位置使用形式主语it。
例如:It is very important to remember this.
2、不定式作表语
例如:He seems to be ill.
注意:不定式作表语主要有三种情况,一是用于seem, appear, prove等系动词之后的不 定式(尤其是to be),
二是像My job is to sweep the floor. 这样的主语与表语“等价”的情形,
三是表示想法、约定、义务、命令、可能性、命运等,如:
You are to come when I call.
3、不定式作宾语
例如:I can not afford to buy a car.
注意:
①不定式不仅用作动词的宾语,还可用作个别介词(but, except)的宾语。
例如:I had no choice but to wait.
②当作宾语的不定式后跟有宾语补足语时,通常要用形式宾语it代替不定式,并将真正的宾语不定式置于宾语补足语之后
例如:I find it difficult to learn Japanese well.
4、不定式作宾语补足语
例如:Who taught you to drive?
5、不定式作定语
例如:I have a question to ask you.
注意:有的名词(如way, chance, right等)后用作不定式可换成of doing sth.
如:It is the best way to do (of doing) it.
但是以下名词后接不定式作定语时通常不能换成of doing sth.
attempt courage decision effort fortune failure invitation wish
6、不定式作状语
例如:I went to France to learn French.
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上一篇:单句改错。1. Speak loudly is good for improving our English. AB C D2. Lily finished to read the book yesterday. ABC D3. Would you like chatting with your pa-九年级英语
下一篇:单词拼写。1. Knives are used for _______ (切割)things.2. I plan to improve my _______ (发音) by having conversations with native speakers.3. The whole room -九年级英语
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