【关于名词性从句练习题】在英语语法中，名词性从句是一个非常重要的知识点，它在句子中起着名词的作用，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，有助于提高英语写作和阅读理解的能力。
以下是一些关于名词性从句的练习题及其答案总结，帮助大家更好地理解和掌握这一语法点。
一、练习题汇总
| 题号 | 题目 | 答案 |
| 1 | I don't know ______ he will come. | whether / if |
| 2 | The question is ______ we should go there. | whether / if |
| 3 | She said ______ she was tired. | that |
| 4 | Do you remember ______ we met? | when |
| 5 | It's unclear ______ he is telling the truth. | whether / if |
| 6 | The teacher asked ______ we had finished our homework. | whether / if |
| 7 | He believes ______ the plan is good. | that |
| 8 | I wonder ______ he is late. | why |
| 9 | The problem is ______ he didn't tell the truth. | why |
| 10 | They are discussing ______ they should accept the offer. | whether / if |
二、总结与解析
1. that 引导的宾语从句
- 当从句是陈述句时，通常使用 that 引导，且 that 在句中不作成分，可省略。
- 例：She said that she was tired.
2. whether / if 引导的宾语从句
- 表示“是否”时，可用 whether 或 if，但在正式语境中更常用 whether。
- 例：I don't know whether he will come.
3. 疑问词引导的宾语从句
- 如 when, why, where, how 等，这些词在从句中作状语，不能省略。
- 例：Do you remember when we met?
4. 表语从句
- 用于系动词后，说明主语的内容，常见结构为 be + that/whether/疑问词。
- 例：The question is whether we should go there.
5. 同位语从句
- 用于解释前面的名词，如 fact, idea, news, hope 等，通常由 that 引导。
- 例：The fact that he lied surprised everyone.
通过以上练习和总结，可以看出名词性从句在句子中的多样性和重要性。建议多做相关练习，并注意从句的引导词选择以及语序问题。希望这份内容能帮助你更好地掌握名词性从句的用法。