4)含有介词的短语动词一般不拆开,即不能转化成“介词+关系代词”结构,介词仍放在动词的后面。如:
Is this the book which she was looking for?
这是她在寻找的那本书吗?(不说…for which she was looking)
The babies whom the nurses are looking after are very healthy.
保育员们照看的那些孩子们很健康。(不说…after whom the nurses are looking)