-She may not be free today.

-If so, we'll have to put the meeting off.

8.在状语从句中也有省略现象：

When (it is) completed, the power station will supply enough

electricity.

If (it is) necessary, I'll go there myself.

She told the children not to talk while (they were) eating.

Anyone, no matter who (he is), may point out our shortcomings.

9.并列句中的省略：后面分句与前句相同的部分，可省略。

I work in a factory and my brother (works) on a farm.

My room is on the second floor and his, on the third.

He majors in English and I in French.

高考新剖析

1. Hearing the dog barking fiercely, away____________ .

［2009年高考上海卷］

A. fleeing the thief B. was fleeing the thief

C. the thief was fleeing D. fled the thief

2. - Shall we have our picnic tomorrow?

-____________ it doesn't rain.［2009年高考山东卷］

A. Until B. While C. Once D. If

3. Never in my wildest dreams____________ these people are

living in such poor conditions.

A. I could imagine B. could I imagine

C. I couldn't imagine D. couldn't I imagine

4. It was announced that only when the fire was under

control____________ to return to their homes.

［2008年高考江西卷］

A. the residents would be permitted

B. had the residents been permitted

C. would the residents be permitted

D. the residents had been permitted

5. -Who should be responsible for the accident?

-The boss, not the workers. They just carried out the

order____________ .［2008年高考福建卷］

A. as told B. as are told

C. as telling D. as they told