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中考英语动词知识点:动词不定式的形式

日期:10-31 19:39:41 | 中考英语复习资料 | 浏览次数: 216 次 | 收藏

标签:中考英语复习资料,http://www.gaofen123.com 中考英语动词知识点:动词不定式的形式,
  1.作主语。 如:
    To learn English is very important.
    但实际上不定式作主语常用 it来作形式主语,而将不定式移至谓语动词后作真正的主语。
    如上句可表达为:
    It's very important to learn English.
    2.作表语。 如:
    My idea is to ring him up at once.
    3.作宾语。 如:
    I have decided to go to Binjiang Primary School.
    4.作宾语补足语
    a. ask, want, teach, tell, know, would like, allow等动词后面接动词不定式作宾语补足语。
    如: The policemen asked him to get off the bus.
    b. hear, see, look at, feel, watch, notice, listen to等动词后接不带to的动词不定式作宾语补足语。
    如: We often see Miss Li clean the classroom.
    c. let, make, have这些使役动词后接不带to的动词不定式作宾语补足语。但在被动语态中这些不带to的都须带上to。
    如: In those days the bosses often made the workers work day and night.
    d.动词help接动词不定式作宾语补足语,可带to也可不带to。
    如: Can you help me (to) carry the heavy bag?
    5.作定语
    a.与被修饰词有动宾关系。如:I have something important to tell you.但如果不定式动词为不及物动词,后面的介词千万不要省略。
    如: Maybe they have three rooms to live in.
    b.与被修饰词有主谓关系。
    如: Mr Liang is always the first to come and the last to leave.
    c.与被修饰之间只有修饰关系。
    如: I have no time to play cards.
    6.作状语,表示目的、原因、方法、方向、结果等。
    如: I'll go to meet my friend at the railway station.
    7.不定式复合结构"for sb. to do sth" 作主语时,常用"It is +adj+ for
    of sb. to do sth"的句式。形容词good, bad, polite, unkind, kind, ice, clever,right, wrong, careful等用"It is +adj +of sb. to do sth."
    其他形容词用 for。
    如:
    It's dangerous for you to ride so fast.
    It's very kind of you to help me.
    8.动词不定式与疑问句who, what, which, when, how, where, whether等连用。
    如: I don't know when to start.
    He didn't tell me where to go.
    但上面结构相当于一个从句,故上述句子也可表达为:
    I don't know when we'll start.
    He didn't tell me where he would go.
    注意:
    a.有些动词或动词短语不能带不定式,只能接动词的-ing形式。
    如: enjoy, finish, keep, mind, miss(错过),be busy, go on, keep on, be worth, practise等。
    如: The peasants are busy picking apples.
    Would you mind my opening the door?
    b.有些动词后可接不定式,也可接动词的-ing形式,但意思不同。
    如: Lu Jian forgot to post the letter.(该寄但还没做)
    Lu Jian forgot posting the letter.(已经寄过信了)
    They stopped to sing a song.(停止在做的工作而去做另一件工作)
    They stopped singing.(停止正在做的工作)
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