名词性从句的先行词在英语语法中起重要作用,包括Wh-疑问词(如who、what、where等)、连接词that、特定名词(如the fact、the idea等)和不定式。这些先行词可以引导主语从句、宾语从句、表语从句和定语从句等。
以下是名词性从句常见的先行词:
- Wh-疑问词
Wh-疑问词包括who、whom、what、when、where、why、which、whose等,它们可以引导主语从句、宾语从句、表语从句和定语从句等。
例如:
- Who is coming to the party? (主语从句)
- I don't know what he said. (宾语从句)
- The problem is where to park the car. (表语从句)
- This is the book which I bought yesterday. (定语从句)
- 连接词that
连接词that可以引导主语从句、宾语从句和表语从句等。
例如:
- That he is late is not surprising. (主语从句)
- I think that you should apologize. (宾语从句)
- The fact is that he is a liar. (表语从句)
- 特定名词
有些名词本身就有指示作用,可以引导名词性从句。例如:the fact、the idea、the problem、the question等。
例如:
- The fact that he lied is very serious. (名词性从句)
- 不定式
不定式可以作为名词性从句的先行词,通常用于引导主语从句和宾语从句。
例如:
- To learn English well is important. (主语从句)
- I want to know what to do next. (宾语从句)