在英语中,关系副词和关系代词都是重要的连接词,但在描述时间、地点和原因时,只能使用关系副词when、where和why,不能使用关系代词。例如,描述时间时,我们可以说"Do you remember the day when we first met?",而不能用关系代词来描述时间。同样地,描述地点和原因也只能使用关系副词。
关系代词包括who、whom、whose、which和that。关系副词包括when、where和why。那么,什么时候只能用关系副词呢?
首先,当我们需要描述一个时间或者时间段时,只能使用关系副词when。比如,我们可以说:
- Do you remember the day when we first met?
- That was the year when I graduated from college.
而不能用关系代词,比如when的同义词which,来描述时间。
其次,当我们需要描述一个地点或者位置时,只能使用关系副词where。比如,我们可以说:
- This is the house where I grew up.
- Do you know the restaurant where we had dinner last night?
同样地,我们不能用关系代词which来描述地点或者位置。
最后,当我们需要描述一个原因或者理由时,只能使用关系副词why。比如,我们可以说:
- That's the reason why I couldn't come to your party.
- I don't know why she didn't answer my phone call.
同样地,我们不能用关系代词which或者that来描述原因或者理由。