摘要：定语从句分为限制性和非限制性两种.限制性定语从句起限定作用,若省去,原有意义不完整,非限制性定语从句起补充说明作用,它与主句之间通常用逗号分开,若省去,原句意义不受影响.如: This is the house which we bought last week. The house, which we bought last week, is very nice. 由上可知,有无逗号是区分限制性定语从句和非限制性定语从句的重要标志.在非限制性定语从句中,关系词不可省略,也不能用that引导.如: This is the photo that / which I took yesterday.(photo 后无逗号,这是限制性定语从句,可用that代替which) Charles Smith, who was my English teacher, moved to New York last year.(本句为非限制性定语从句,关系词who在从句中作主语,指代人,但不能用that代替) This novel, which I have read three times, is very interesting and moving.(本句为非限制性定语从句,关系词which在从句中作宾语,指代物,既不能省略,也不能用that代替) 注意:关系代词that和关系副词why不能引导非限制性定语从句.

网址：http://m.1010jiajiao.com/timu3_id_2959742[举报]