英语中的从句是重要的语法部分，包括名词性从句、定语从句和状语从句。名词性从句可以作为主语、宾语、表语等，定语从句可以修饰名词或代词，状语从句可以修饰动词、形容词、副词等，使句子更丰富、具体和流畅。
名词性从句
名词性从句可以在句子中充当名词的角色，可以作为主语、宾语、表语等。下面是几个例子：
- 主语从句：What you said is true. (你说的是真的。)
- 宾语从句：I know that you are busy. (我知道你很忙。)
- 表语从句：The fact is that he is not coming. (事实是他不来。)
定语从句
定语从句可以用来修饰名词或代词，从而使句子更加具体、详细。下面是几个例子：
- The book which I borrowed from the library is very interesting. (我从图书馆借来的那本书非常有趣。)
- The woman whose car was stolen reported it to the police. (车被盗的那位女士向警方报案。)
- The city where I was born is very beautiful. (我出生的那个城市非常美丽。)
状语从句
状语从句可以用来修饰句子的动词、形容词、副词等，从而使其更加完整、流畅。下面是几个例子：
- When I saw him, he was reading a book. (当我看到他的时候，他正在读书。)
- Although it was raining, we still went for a walk. (虽然下雨了，但我们还是去散步了。)
- She sings as if she were a professional singer. (她唱歌的样子像是一个专业的歌手。)
