名词性从句是英语语法的重要知识点,可以作为主语、宾语、表语和同位语等。主语从句在句子中充当主语,宾语从句在句子中充当宾语,表语从句在句子中充当表语,同位语从句在句子中充当同位语。各类从句的引导词包括that, whether, who, whom, what, which等。
主语从句
主语从句是指在句子中充当主语的从句。常见的引导词包括that, whether, who, whom, what, which等。例如:
- That he is busy is true. (他很忙是真的。)
- Whether he will come or not is uncertain.(他来不来还不确定。)
- Who will attend the meeting is not yet known.(谁来参加会议还不清楚。)
宾语从句
宾语从句是指在句子中充当宾语的从句。常见的引导词包括that, whether, if, who, whom, what, which等。例如:
- She doesn't know where he lives.(她不知道他住在哪里。)
- They asked me if/whether I had finished the work.(他们问我是否已经完成了工作。)
- I don't know what he is doing now.(我不知道他现在在干什么。)
表语从句
表语从句是指在句子中充当表语的从句。常见的引导词包括that, whether, who, whom, what, which等。例如:
- The fact is that he is not suitable for the job.(事实是他不适合这份工作。)
- My problem is what I should do next.(我的问题是接下来该做什么。)
同位语从句
同位语从句是指在句子中充当同位语的从句。常见的引导词包括that, whether, who, whom, what, which等。例如:
- The news that he has won the prize is exciting.(他获得奖项的消息是令人兴奋的。)
- The fact that he is late again annoys me.(他又迟到了这一事实让我很生气。)