1. 名词性从句
名词性从句可以在句子中充当名词的角色,通常由连接词that, if, whether, who, whom, whose, what, which, when, where, why等引导。
例句:
- I don't know what he said.(我不知道他说了什么。)
- She asked me whether I could help her.(她问我能否帮她。)
- Whoever comes first can sit in the front row.(谁先来谁可以坐在前排。)
2. 形容词性从句
形容词性从句一般用来修饰名词或代词,通常由连接词that, who, whom, whose, which等引导。
例句:
- The book that I borrowed from the library is very interesting.(我从图书馆借的那本书非常有趣。)
- The girl who is wearing a red dress is my sister.(穿红色裙子的那个女孩是我的妹妹。)
- This is the place where we first met.(这是我们第一次见面的地方。)
3. 副词性从句
副词性从句一般用来修饰动词、形容词或副词,通常由连接词when, where, why, how, as, than, as if, as though等引导。
例句:
- She always sings when she is cooking.(她总是一边做饭一边唱歌。)
- He is taller than I am.(他比我高。)
- It looks as if it is going to rain.(天看起来要下雨了。)
4. 状语从句
状语从句一般用来表示时间、原因、条件、方式、结果等,通常由连接词when, while, before, after, since, until, because, as, if, unless, although, though, even if, as if等引导。
例句:
- I will go to bed after I finish my homework.(我做完作业后就会去睡觉。)
- Because it was raining heavily, she decided to stay at home.(因为下大雨,她决定呆在家里。)
- Unless you study hard, you will not pass the exam.(除非你努力学习,否则你不会通过考试。)