Period Three　Grammar & Writing

单元语法--动词不定式和but＋不定式

Ⅰ.课文原句感知

1．Scientists have tried many ways to solve(solve) this problem and in China，a mass campaign has been started to help(help) solve it.

2．The storms sometimes continue all day and traffic moves very slowly because the thick dust makes it difficult to see(see)．

3．Weather experts advise people not to go(go) out.

4．It's difficult to breathe(breathe) and the dust makes me ill.So if you want to go(go) out，you'd better wear a mask.

5．To prevent(prevent) it coming nearer，the government is planting trees.

Ⅱ.完成句子

1．他要求被派往农村工作。

He asked to be sent to work in the countryside.

2．看到父亲睡着了，他尽量不弄出任何声响来。

Seeing his father was asleep，he tried not to make any noise.

3．她看起来比实际年龄年轻多了。

She appears to be much younger than her age.

4．明天举行的会议是关于如何控制污染的。

The meeting to be held tomorrow is about how to control the pollution.

一、动词不定式的时态和语态形式

语态

时态 主动 被动 一般式 to do to be done 进行式 to be doing 完成式 to have done to have been done