.介词+which/whom 引导的定语从句1 在“介词+which/whom”结构中，关系代词用which 还是用whom ，取决于它前面的先行词是物还是人。先行词是物， 用which ； 若为人，就用whom 。如：(1) Nearby were two ships in which they had come to the island.(2) I cant remember the name of the person to whom I gave the money.2 这一结构用什么介词取决于先行词的意义和定语从句中谓语动词结构及“介词+which/whom” 在句中的作用。(3) This is the room in which we lived last year.(4) There were three people from whom we attempted to find out information.3 因为含有介词的短语动词一般不拆开，介词仍放在动词的后面。 此种情况下关系代词可用which, that , who
