Period Three　Grammar，Speaking & Writing

一、动词­ing形式作表语

1.表示主语具有的特征、性质和状态(动词­ing形式相当于一个形容词)。常用来作表语的现在分词有astonishing，amusing，confusing，disappointing，boring，encouraging，inspiring，moving，tiring，interesting，surprising等。

The problem is quite puzzling.

这个问题很令人困惑。

2.表示主语的内容，可以转换到句首作主语。

Her job is keeping the lecture hall as clean as possible.

＝Keeping the lecture hall as clean as possible is her job.

她的工作是尽量使报告厅保持干净。

即时跟踪1　用所给动词的正确形式填空

1.His hobby is collecting(collect) stamps.

2.The problem is quite confusing(confuse).

3.Her job is taking(take) care of these little children every day.

4.The news from the meeting is very encouraging(encourage).

二、动词­ing形式作定语

1.表示名词的属性或作用及用途(动名词)。

We are not allowed to speak aloud in the reading room.

阅览室里不准我们大声说话。

There is a swimming pool in our school.

我们学校有一个游泳池。

2.表示所修饰的名词的动作或状态，相当于一个定语从句(现在分词)。

当分词单独作定语时，常放在所修饰的名词前；如果是分词短语作定语，则放在该名词后。

The boy studying in the classroom is our monitor.