介词for的三条用法说明

发布时间:2022-04-21T11:06:41 英语语法

介词for的三条用法说明

 

1. 后接名词可用来表示目的。如:

What did you do that for? 你干吗这样做?

I try to go for a run every day. 我每天都试着跑一跑。

但它习惯上不能后接动名词来表目的,遇此情况可改用不定式发,如:

He went there to see his uncle. 他去那儿看他叔叔。

不过,对于已经名词化的动名词,它可以与for连用表目的。如:

He went there for swimming. 他去那儿游泳。(swimming 已名词化)

另外,for doing sth 虽然不用于表目的,但可用于表原因、用途等。如:

Thank you for coming to see me. 谢谢你来看我。

This is a tool that’s used for cutting hedges. 这是一样用来整修篱笆的工具。

2. 用于表示时间或距离的长度(尤其是紧跟在动词之后)时,有时可省略。如:

The meeting lasted (for) three days. 会议持续了3天。

They walked (for) fifty miles. 他们走了50英里。

但是,当for短语位于句首或在否定句中时,for 通常不宜省去。如:

For ten years he lived here. 他在这里住过10年。

We have not heard from him for a long time. 我们很久没收到他的来信了。

3. 用于for sb to do sth引出不定式的逻辑主语时,该结构可用作主语、表语、宾语、定语、目的状语、结果状语、比较状语等。如:

For a child to do that job is just inconceivable. 让一个孩子做这项工作真是不可思议。

It is for you to decide. 该由你来决定。

I meant for you to eat, son. 我的意思是要你吃,孩子。

Is there any need for me to go? 我有没有必要去?

She opened the door for me to come in. 她开门让我进去。

The box is too heavy for me to carry. 这箱子太重了,我搬不动。

There’s nothing worse than for a person to ill-treat a child. 没有什么比虐待小孩更恶劣的了。