表语从句是考研英语中常见的语法点，用于说明主语的性质、状态或身份。它通常由连词引导，如that、whether、what等，位于系动词之后。
以下是常见表语从句结构总结：
| 类型 | 引导词 | 例句 |
| that引导 | that | The fact is that he was late. |
| whether引导 | whether | The question is whether we can win. |
| what引导 | what | The problem is what we should do. |
| how引导 | how | The issue is how we will solve it. |
掌握这些结构有助于提高阅读理解与写作能力。建议多做相关练习题，巩固语法运用。
