【名词性从句练习题】在英语语法中，名词性从句是一个非常重要的知识点，它在句子中可以充当主语、宾语、表语或同位语。掌握好名词性从句的用法，有助于我们更准确地理解和运用英语句子结构。
下面是一些关于名词性从句的练习题，帮助大家巩固相关知识。
一、选择题（每题只有一个正确答案）
1. I don’t know ______ he will come tomorrow.
A. if
B. that
C. whether
D. what
2. The teacher asked ______ we had finished our homework.
A. if
B. that
C. whether
D. what
3. She is not sure ______ she should accept the job.
A. if
B. that
C. whether
D. what
4. The problem is ______ we can finish the work on time.
A. if
B. that
C. whether
D. what
5. He told me ______ he was going to leave.
A. if
B. that
C. whether
D. what
二、填空题
根据句子意思，用适当的引导词填空：
1. I don’t know ______ he is.
2. The question is ______ we should go there.
3. She said ______ she would be late.
4. It’s unclear ______ he will win the competition.
5. Do you know ______ the meeting starts?
三、改错题
找出下列句子中的错误并改正：
1. I don’t know if he is coming, but I think that he will.
2. She asked me that where I was going.
3. The fact is that he didn’t tell the truth.
4. Whether he will come is not clear.
5. I wonder if he knows what I said.
四、翻译题
将下列中文句子翻译成英文，注意使用正确的名词性从句结构：
1. 我不知道他是否会在明天到达。
2. 问题是他们是否能按时完成任务。
3. 她告诉我她会参加这个会议。
4. 这个事实是他们已经失败了。
5. 我想知道他为什么没来。
参考答案：
一、选择题
1. A / C
2. A / C
3. C
4. C
5. B
二、填空题
1. who / what
2. whether / if
3. that
4. whether / if
5. when
三、改错题
1. “but I think that he will” → “but I think he will”
2. “that where I was going” → “where I was going”
3. 正确
4. 正确
5. 正确
四、翻译题
1. I don’t know if he will arrive tomorrow.
2. The question is whether they can finish the task on time.
3. She told me that she would attend the meeting.
4. The fact is that they have failed.
5. I wonder why he didn’t come.
通过这些练习题，相信大家对名词性从句的使用有了更深入的理解。建议多做类似题目，并结合实际语境进行练习，以提高语言运用能力。
