四级英语常用语法

2013-06-04 11:04:26 字体放大:  

书名, 国家名用单数:

Tales from Shakespeare is a book by Charles Lamb.

学科名, 如mathematics, economics用单数.

many a 或more than one 所修饰的词作主语时, 谓语动词多用单数形式:

Many a person has had that kind of experience.

More than one person has involved in the case.

a number of 后接复数, the number of后接单数:

A number of books have been published on the subject.

The number of books published on the subject is simply amazing.

one of those 后用单数. 在“one of + 复数名词 +关系分句”结构中,关系分句中谓语动词的单复数形式在一般情况下有两形式,一是根据先行词采用复数形式:

Joan is one of those people who go out of their way to be helpful.

当one 之前友the only 等限定词和修饰语时,关系分句谓语动词根据one 而定,即采用单数形式:

He is the only one of those boys who is willing to take on another assignment.

Ⅱ 非谓语动词

不定式

形式

主动形式 被动形式

一般式 to do to be done

完成式 to have done to have been done

进行式 to be doing

完成进行式 to have been doing

完成式: 不定式的一般形式所表示的动作, 通常与主要谓语表示的动作(状态)同时(或几乎同时)发生, 或是在它之后发生. 假如不定式所表示的动作, 在谓语所表示的动作(状态)之前发生, 就要用不定式的完成式.

I am glad to have seen your mother (= I am glad I have seen your mother).

(比较: I am glad to see you.)

He is said to have written a new book about workers.

He pretended not to have seen me.

进行式: 如果主要谓语表示的动作(状态)发生时, 不定式表示的动作正在进行, 这时要用不定式的进行式.

You are not supposed to be working. You haven’t quite recovered yet.

We didn’t expect you to be waiting for us here.

He pretended to be listening attentively.

完成进行式: 在谓语所表示的时间之前一直进行的动作, 就要用不定式的完成进行式.

The struggle was known to have been going for twenty years.

We are happy to have been working with you.

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