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Advance with EnglishUnit 3Grammar and usageNon-restrictive attributiveclauses非限制性定语从句skinny adj.极瘦的，皮包骨的lift vt.举起consider vt.考虑effect n.效果，作用;影响affect vt.影响sportsman n.运动员n ・取肌 n. & vt.冒险 n.（在网上发布的）帖子副作用（头发等）脱落 achievementrisk postside effectfall outWho is he?*The man who/that issitting there is Brad Pitt.*The man who/whom/that/- she speaks to isBrad Pitt.*The manto whom shespeaks is Brad Pitt.Cecilia, who took weight-loss pills, now realizes thathealth is important.Cecilia ，whose body isthin, still wants to lose some限制性定语从句与先行词之间不用逗号隔开；Who is she? weight （减肥）.非限制性定语从句与先行词之间一般用逗号隔开。
My cousin whose father is a teacher wants to be an actor.My cousin，whose father is a teacher，wants to be an acton1.A・ This is the place where I lived ten years ago.B・ She is going to spend the winterholiday in Macao, which returned to \ China in 1999. i i 2.A. He is a man who I can ask for help・羹B・ His father, who works in Beijing, 1 came back yesterday.限制性走语从句和先行词关系密切＞如果去掉从句,剩余部分意义不完整；非限制性走语从句只是先行词的附加说明＞如果去掉从句＞意义仍然完整。
江苏省盐城市射阳县第二中学高中英语活动单 Grammar 新人教版必修1 Class____ Name________ Number_______“介词+ which / whom”引导的定语从句“介词+关系代词”引导的定语从句，是定语从句一种介词前置的定语从句句型，介词与关系代词之间存在一种介宾关系。
当关系代词在定语从句中作介词宾语时，把介词置于关系代词前，即演变出“介词+关系代词”句型。
例如：The man who/whom /that you spoke to is a teacher.=The man to whom you spoke is a teacher.一、基本构成1.“介词+关系代词”结构引导的定语从句中，关系代词只能用which（指物）或whom(指人) ，即：介词+which/whom。
（1）The man to whom you spoke is a tea cher.（2）The city in which she lives is far away.（3）The little girl is r eading a book, in which there are many cartoons.注意：当介词放在关系代词的前面时，用在介词后的关系代词不能省略。
2.在限制性定语从句中，当介词置于定语从句的谓语动词之后时，可用that/which(指物)；that/who/whom（指人）作介词的宾语.且此处关系代词可以省略，特别是在口语中。
如：（1) The man (who/whom /that )you spoke to is a teacher.（2）The city（which/that）she lives in is far away.注：通常介词放在定语从句中动词后，也可以放在关系代词前面，但有些特殊动词短语搭配不能拆分，介词只能放在动词后，如： look for, look after, pay attention to ,take care of , look forward to, listen to等。
