名词性从句是充当名词成分的从句,包括主语从句、宾语从句、表语从句和同位语从句。主语从句在句子中充当主语,常由连接词引导。宾语从句在句子中充当宾语,常由连接词引导。表语从句在句子中充当表语,常由连接词引导。同位语从句是与某个名词或代词并列的从句,用来解释或说明这个名词或代词,常由连接词引导。
主语从句
主语从句在句子中充当主语,常由连接词that、whether、if等引导。例如:
- That she is late is not surprising.(她迟到并不奇怪。)
- Whether he will come is still uncertain.(他是否会来还不确定。)
- If it rains tomorrow,we will stay at home.(如果明天下雨,我们就呆在家里。)
宾语从句
宾语从句在句子中充当宾语,常由连接词that、whether、if、who、whom、whose、when、where、why等引导。例如:
- I know that he is busy.(我知道他很忙。)
- She asked me whether I had seen the movie.(她问我是否看过那部电影。)
- Tell me if you need any help.(告诉我是否需要帮助。)
- Do you know who she is?(你知道她是谁吗?)
- He asked me whose book it was.(他问我那是谁的书。)
- I don't remember when we met.(我不记得我们什么时候见面了。)
- Can you show me where the station is?(你能告诉我车站在哪里吗?)
- I don't know why he left.(我不知道他为什么离开。)
表语从句
表语从句在句子中充当表语,常由连接词that、whether等引导。例如:
- The fact that he passed the exam made his parents happy.(他通过了考试这个事实让他的父母很高兴。)
- The question is whether we should go or not.(问题是我们是否应该去。)
同位语从句
同位语从句是指在句子中与某个名词或代词并列的从句,用来解释或说明这个名词或代词,常由连接词that、whether等引导。例如:
- The news that she got married surprised us.(她结婚的消息让我们感到惊讶。)
- His hope that he could pass the exam was not fulfilled.(他通过考试的希望没有实现。)