lack用法

lack用法

（1）.lack 动词，意思是“缺乏；不足；没有”。作及物动词用。例如：

He lacks courage.他缺乏勇气。

She lacked the experience to get the job.她经验不足，无法获得这份工作。

(2)当它不及物的时候，即是lack for的用法的时候，常常用于否定句.所以这个句子中的for不能省略.

She does not lack for friends.

作不及物动词，意思是“还可作“缺乏，短少；不足；需要”，常用进行时，不及物。例如：

Something is lacking.缺少点什么东西。

Is she lacking in courage?她缺乏勇气吗?(wisdom,intelligence)

(3)名词

Lack+of＋名词： The plants died for lack of water.

The lack of rain aggravated the serious lack of food.

"由于干旱少雨,缺粮问题更加严重。"

Owing to lack of time, we cannot do more than what we have done.

由于时间不够，我们只能做到这样。

Lack of funding is making our job more difficult. 资金短缺使我们的工作更加困难。

Lack of heat made us cold.没有暖气使我们感到很冷。

【即景活用】

Many of our young workers ___ proper training.?

A. are lacking in B. are lacking ? C. lack for D. lack in?

【答案解析】A。此题考查动词lack的用法。根据句意“我们很多青年工作者缺少必要的培训”。

和lack相关的短语有be lacking in“ 缺少”。因此答案为A。

Though____ money, his parents managed to send him to university.

A. lacked B. lacking of C. lacking D. lacked in

【答案解析】 C lack 直接作及物动词 lack sth，是主动形式，lack 也可以做不及物动词 lack in sth 表示”缺少”，但也是主动形式。 用现在分词作状语，表主动AD错在没用现在分词，所以不表示主动意义。B错，当lack of 表缺少是lack 作名词，如there is a lack of labor. 所以选C

一、

当不定式的逻辑主语是不定式所表示的动作的承受者而非发出者时，不定式一般要采用被动形式(to be done).

语法功能：

1．作主语：

It is an honour for me to be asked to speak here.

2作宾语：

She asked to be sent to work in Xinjiang.

3．构成复合宾语：

He wanted the letter to be typed once.

She didn‟t like herself to be praised like that.

4．构成复合谓语：

The books are not allowed to be taken out of the room

5．作定语：

Are you going to the meeting to be held in the teachers’ office?

6．作状语：

She was too young to be assigned such work.

二、不定式有时还可以有完成式的被动式to have been done（表示该动作是发生在主句之前的一个被动动作），在句中作主语、宾语、定语，或者构成复合宾语、复合谓语等，如：

It is a good thing for him to have been criticized.（主语）

She preferred to have been given heavier work to do. (宾语)

He thought it an honour to have been invited to the party. （复合宾语）

The book is said to have been translated into many languages. （复合谓语）

She was the first woman to have been elected to such a post. （定语）

三、不定式的主动形式表示被动

1．在there be结构中。

例如：There is no time to lose (to be lost).

2．在n／pron + be + adj + to do”结构中。常用的形容词有easy，difficult，hard，impossible，nice，pleasant，light，heavy，interesting，important，expensive，cheap，fit，dangerous等。

例如

He is hard to convince.

He is an impossible person to work with