1.Thisisthegentlemanwhohelpedmeoutofthetrouble.定语从句定语从句：修饰名词或代词对其启到限定作用的句子。被定语从句修饰的名词或代词叫先行词。引导定语从句的词叫关系代词以及关系副词（when/where/why)1.Theboy_______wesawyesterdaywasJohn’sbrother.Who&that3>为避免重复或引起歧义7>用在非限制性定语从句中指人大家应该也有点累了，稍作休息2>先行词被theonly,thevery,thelast,thevery及序数词修饰4>先行词人物共存时7>为避免重复通常使用whch的情况**which的特殊用法**Whose的用法Whose+N=N+ofwhich介词+关系代词刚才与我们校长谈话的那个人是我们的英语老师特殊的关系代词**Thesame…as..表示它的内容与先行词所讲的事物是一类，而thesamethat…是同一个**Which&as的区别but关系副词引导的定语从句1>NeverwillIforgetthedays________wespenttogetherinourmiddleschool.2>Thisisthefactory________myfathervisitedyesterday.3>Isthisfactory_______myfathervisitedyesterday?4>Wasthisthereason_________heexplainedtousforhisbeinglate?He’sgothimselfintoadangeroussituation_______heislikelytolosecontrolovertheplane.A.whereB.whichC.whileD.why定语从句中的主谓一致【注意】