1. We didn’t go out for a walk because it was raining. (变为简单句)

We didn’t go out for a walk _______ _______ the rain.

2. He was so excited that he couldn’t go to sleep. (变为简单句)

He was _______ _______ _______ go to sleep.

3. I don’t know when we will begin the work. (变为简单句)

I don’t know _______ _______ _______ the work.

4. You must finish all the work before you go to bed. (变为简单句)

You must finish all the work _______ _______ to bed.

5. He got up early in order that he could catch the early bus. (变为简单句)

He got up early _______ _______ _______ catch the early bus.

6. We all expect him to come to the party. (变为复合句)

We all expect _______ _______ _______ come to the party.

7. We can’t decide where to go. (变为复合句)

We can’t decide _______ _______ _______ go.

8. Please tell me when to leave for the front. (变为复合句)

Please tell me _______ we _______ leave for the front.

9. Now I will show you how to do the work. (变为复合句)

Now I will show you _______ _______ _______ do the work.

10. You should put them back after you use them. (变为复合句)

You should put them back _______ _______ them. 

参考答案

1. because, of。because引导的原因状语从句改为简单句时可用because of + 名词。

2. too, excited, to。so…that引导结果状语从句，变为简单句时，如果that从句为否定式，可用too + 形容词 + to结构。

3. when, to, begin。在when引导的宾语从句中，变简单句时，可用when + 不定式结构。

4. before, going。在before引导的时间状语从句中，如果主从句的主语相同，那么变为简单句时可用介词before改写。

5. in, order, to。in order that 引导目的状语从句，变为简单句时可用in order to + 动词原形改写。

6. that, he, will。根据句意“我们都期望他能来参加这个晚会”可把该简单句改为含宾语从句的复合句。

7. where, we, should。疑问词where +不定式作动词decide的宾语，根据句意，可把其变为由连接副词where引导的宾语从句(from www.zkenglish.com)。

8. when, will。疑问词when +不定式短语作动词tell的宾语，根据句意，可把其变为由连接副词when引导的宾语从句。

9. how, you, should。疑问词how +不定式短语作动词show的宾语，根据句意，可把其变为由连接副词how引导的宾语从句(from www.zkenglish.com)。

10. after, using。在after引导的时间状语从句中，如果主从句的主语相同，那么变为简单句时可用介词after改写。