主语从句专项练习

主语从句专项练习指南

主语从句是英语句子中的一种复杂结构，它充当句子的主语。为了帮助学生更好地掌握这一语法点，以下提供了一系列有针对性的主语从句专项练习题及解析，旨在通过实践加深理解并提高应用能力。

一、识别主语从句

练习1：从下列句子中找出主语从句并指出其引导词。

1. What he said made me angry.
   答案：What he said（引导词：what）

2. Whether we will go for a picnic depends on the weather.
   答案：Whether we will go for a picnic（引导词：whether）

3. That she is honest is known to us all.
   答案：That she is honest（引导词：that，注意此处that可省略但句子意思不变）

4. How you can improve your English needs careful consideration.
   答案：How you can improve your English（引导词：how）

二、选择适当的引导词填空

练习2：根据句意选择合适的引导词填空。

1. ______ he did yesterday surprised everyone. (A. What, B. How)
   答案：A. What

2. ______ it is to swim in the sea! (A. How fun, B. What fun)
   答案：A. How fun（注：“fun”作为形容词时，常用“how”修饰；若用“what”，则需改为“what fun it is to do sth.”结构）

3. ______ they found in the cave remains a mystery. (A. What, B. Which)
   答案：A. What

4. ______ he will come or not doesn't matter much. (A. If, B. Whether)
   答案：B. Whether（在主语从句中，通常用“whether...or not”表示“是否”）

三、构建主语从句

练习3：将下列简单句改写为主语从句形式。

1. He is honest. This is known to us all.
   改写：That he is honest is known to us all.

2. The book is interesting. I think so.
   改写：I think that the book is interesting.

3. She will arrive tomorrow. It is uncertain.
   改写：It is uncertain whether she will arrive tomorrow.

4. They should do more exercise. The doctor advised.
   改写：The doctor advised that they should do more exercise.

四、综合应用

练习4：阅读下面短文，并在空白处填入适当的内容或引导词完成句子。

通过以上专项练习，相信你能对主语从句有更深入的理解和更熟练的掌握。记得多做练习，不断巩固所学知识哦！