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505 Infinitive(不定式)
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不定式是动词的一种形式,多数前面都带to,如:
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I’m so glad to see you.
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这种动词非常有用,在句子中可作各种成分:
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作宾语:
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He offered to help us.他主动提出帮助我们。
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Mary begged to go with us.玛丽恳求和我们一道去。
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We can’t afford to buy a car.我们买不起车。
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在很多动词后都可以跟这样的宾语,常见的有:
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afford agree aim arrange ask attempt beg begin care choose consent continue dare decide demand desire determine endeavour expect fail forget hate help hope intend learn like love manage mean neglect offer plan prefer prepare pretend promise refuse remember start trouble try undertake volunteer vote wait want wish 有些动词后的宾语由一个连接代(副)词引起的不定式短语构成:
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They taught me how to repair farm tools.他们教我怎样修理农具。
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We must decide whether to go or to stay.我们得决定去还是留。
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I hope you’ll tell me what to do.我希望你告诉我该怎样做。
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构成复合宾语(多由名词或代词+不定式构成):
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They encouraged me to try again.他们鼓励我再试一下。
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I didn’t expect you to arrive so early.我没料到你来得这样早。
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He wants you to call him back at 11.他要你11点钟给他回电话。
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跟这种结构的动词也很多,常见的如:
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advise allow ask beg cause command compel encourage expect forbid force get hate help instruct intend invite like love oblige order permit persuade prefer press remind request teach tell urge want warn wish 有些动词(如feel,have,hear,let,make,notice,see,watch等)后的复合结构中不定式不带to:
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What made you think like that?什么使你这样想?
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Let me see.让我想想。
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Don’t forget to have him call me tonight.别忘了让他今晚给我打电话。
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甚至在look at和listen to之后也如此:
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Look at the boy run.瞧这个男孩儿跑。
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He sat listening to him climb the stairs.他坐着听他爬上楼来。
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