把两个句子变为一个时,连接词的问题（英语）the temple is the oldest in Egypt.We visited it.变成一个句子是the temple we visited is the oldest in Egypt.The power stations is very dirty.It burns coal.变成一个句子是The power stations which burns coal is very dirty.为什么第一个句子不用连接词,而第二个句子要用which?
问题描述：
把两个句子变为一个时,连接词的问题（英语）
the temple is the oldest in Egypt.We visited it.
变成一个句子是
the temple we visited is the oldest in Egypt.
The power stations is very dirty.It burns coal.
变成一个句子是
The power stations which burns coal is very dirty.
为什么第一个句子不用连接词,而第二个句子要用which?
答
the temple （we visited） is the oldest in Egypt. 将括号里面的去掉，你发现还是通顺的，因为WE VISITED在这里做插入语
The power stations （which） burns coal is very dirty. 这里你去掉WHICH，发现有两个谓语动词，一个BURN, 一个IS，这就不对了，所以这里要用WHICH 来指代前面的the power stations
答
两个都是将两句话的其中一句变成定语从句从而两句变一句的例子.你说的连接词是定语从句的关系代词.之所以第一个不用第二个要用,是因为第一个里面关系代词是作的宾语（visit的宾语）而第二个里面关系代词是作的主语（...