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

不定式的主动形式表被动

1. 在 there be 结构中。

There is a lot of homework to do.

There is no time to lose.

2. 在"... 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。

He is hard to convince.

He is impossible to work with.

3. 在"too ... to ...; enough ... to ..."结构中。

The problem is too difficult to work out.

The house is big enough to live in.

4. 在"with + n. + to do"结构中。

With nothing to do, he lay in bed.

With so many exercises to do, I can't go to the cinema.

5. 当不定式的逻辑主语在句中出现时。

I have a letter to type today.

Do you have anything to say?

6. 一些作表语用的不定式的主动形式表被动。

I felt I was to blame.

Step III Go over the passive voice

1. 知道或没有必要说明动作的执行者是谁的时候, 或强调动作的承受者时。

Printing was introduced to Europe from china.

Look! There is nothing here. Everything has been taken away.

不同时态的被动语态

一般现在时：____________________

1. English is spoken by many people.

2. I am asked to get up early everyday.

3. The books are written by Lu Xun.

一般过去时：____________________

These computers were made in our own country.

一般将来时：_____________________

Shall we be asked to attend the opening ceremony?

过去将来时：_____________________

The news would be sent to the soldier's mother as soon as it arrived.

现在进行时：________________________　

The machine is being repaired in the workshop.

过去进行时：________________________

The feast was being prepared when the birds arrived in the sky.

现在完成时：________________________

Great progress has also been made in culture and education.

过去完成时：_________________

The huge bridge had been damaged before