高中英语语法知识点:不定式的用法_英语知识点_精品学习网

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  • 社会生活的信息化和经济的全球化,使英语的重要性日益突出。精品小编准备了高中英语语法知识点,具体请看以下内容。

    一、人际交往方面:尽快融入到班集体中去

    动词不定式具有名词、形容词和副词的特征。因此在句中可以做主语、表语、宾语、宾语补足语、定语和状语。

    一、不定式做主语:

    1、不定式做主语一般表示具体的某次动作。===动名词doing 表示习惯的,经常的动作。

    e.g: To finish the building in a month is difficult.

    To do such things is foolish.

    To see is to believe. (对等)

    注: 1). 不定式作主语时,谓语用单数

    2). 当主语较长,谓语较短时,常用it做形式主语,而将不定式放到谓语的后面。

    it做形式主语,不定式放在谓语动词之后常用于下列结构中:

    (1)It is/was +adj.+of sb. to do…

    (2) It is +adj.+for sb.+to do…

    It is easy / difficult / hard / foolish / unwise / right / wrong / unnecessary

    (3) it is +a +名词+ to do...

    It is a pity / a pleasure / a pleasant thing / one’s duty / an honor / a shame / a crime / no easy job… to do

    It takes (sb.) some time / courage / patience …to do…

    It requires courage / patience / hard work… to do…

    *注意: probable 和 possible 均可作表语,但possible可以用不定式作真实主语, 而probable不能用不定式作真实主语。

    It is probable for him to come to the meeting.(错)

    It is possible for him to come to the meeting.

    It is possible / probable that he will come to the meeting.

    二、不定式做表语

    主语是以aim duty hope idea intention plan job suggestion wish purpose task 等为中心词的名词词组 或以 what 引导的名词性从句表示,后面的不定式说明其内容, 不定式作表语常表示将来或现在的动作或状态。

    eg :My idea is to climb the mountain from the north.

    Your mistake was not to write that lette r.

    What I would suggest is to start work at once.

    三 、动词不定式作宾语

    以不定式结构为宾语的动词有:

    ask, agree, care, choose, demand, decide, expect, fail, help, hope, learn, manage, offer, plan, prepare, pretend, promise, refuse, want, wish等只能用动词不定式作宾语

    口诀(接不定式作宾语的动词)

    想要学习 早打算( want learn plan)

    快准备 有希望( prepare hope wish expect)

    同意否 供选择(agree offer choose)

    决定了 已答应(decide be determined promise)

    尽力去 着手做(manage undertake)

    别拒绝 别假装(refuse pretend)

    失败不是属于你(fail)

    e.g.Tom refused to lend me his pen.

    We hope to get there before dark.

    The girl decided to do it herself.

    *注意:某些及物动词可用-ing也可用动词不定式作宾语但意义不同的有

    stop go on remember forget

    regret try mean can’t help

    be used to

    高中是人生中的关键阶段,大家一定要好好把握高中,编辑老师为大家整理的高中英语语法知识点,希望大家喜欢。

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  • 2016-04-16