职称英语考试基础词汇重点解析80

作定语

e.g. These dialogues may be used as listening materials. (= materials for listening)

e.g. The Reading Room of the British Museum is a large round hall. (=Room for Reading)

Ⅲ动名词的时态与语态

动名词分一般式和完成式，一般式表示一般性的动作概念，不明确动作发生的时间（如现在、过去或将来），有主动语态和被动语态。如：

Besides reading, he is fond of collecting stamps. (主动)/ 除了阅读以外，他还喜欢集邮。

Was she upset at not being invited? (被动)/ 她是否因没有受到邀请而感到不快？

动名词完成式用来表示发生在谓语动作前的动作。它也有主动语态和被动语态。如：

I remember having read the article on economic systems.

After having been tested, the instrument was sent to the laboratory. (被动)

Comp: Having been tested, the instrument was sent to the laboratory.

注：

① 动名词的完成式用得较少，有时动名词表示的动作虽然发生在谓语动作之前，也常用动名词的一般式来代替。如：

After being desalted, sea water can be used for drinking.

② 在need, require, want等动词后面，一般不用动名词的被动形式，即使表示被动意思，也用动名词的主动形式代替。如：

The house wants repairing./ 这房子需要修理了。