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2018届高考英语语法非谓语动词不定式用法讲解

备考2018届高考英语语法

非谓语动词之不定式

英语中的动词不定式在考试中是比较常见的。不定式在句子中可做主语、宾语、表语、定语、状语和宾语补语。以下是动词不定时的用法解析。

1动词不定式做主语一般表示具体的某次动作。

【例如】

To complete the 30 storied building in one year was quite a difficult task.

To do that implies taking responsibility.

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。

【例如】

It is important for modern young people to master at least two foreign languages.

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:

aIt is+形容词(easy, important, difficult, foolish, inconvenient, unnecessary, right, wrong...+( for/of sb.+不定式

【例如】

It is essential to reserve a table in advance of Christmas Eve.

It is not easy to catch fish with your hands only.

It is important for us young people to learn English and master it.

b It is+名词(a pleasure, a pity, a pleasant thing, one’s duty, an honor, a shame, a crime, no easy job...+不定式

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