关系从句一、定语从句：关系词（关系代词和关系副词）也叫形容词性从句关系代词：that /which /who/ whom 在从句中做主语和宾语，做宾语时可省略关系副词：when/where/why 在从句中做时间、地点、原因状语Who 及 whom 用法区别:前者不能做宾语后者可以The boy standing there is Tom who is my friend.He is the very person to whom I would like to talk.Whose 为关系限定词后面需加名词This is the book whose owner is our teacher.That 及 which 引导从句时区别：用 that 不用 which 的情况1.先行词既有人又有物 2.先行词为 all,little,few,much,none,the first 时 3.先行词是不定代词 something,anything,nothing,everything 时 4.先行词被最高级或 the only the very 等修饰 the very problem that I want to solve is like this. 用 which 不用 that 的情况1.非限制性定语从句中 2.做介词的宾语 eg. The world in which we live is made up of matter.限制性与非限制性定语从句的区别（有无逗号隔开，主从句关系是否紧密）关系副词 when 和 where 均可引导限制和非限制性定语从句 why 只引导限制性定语从句. The reason why he is late is unknown.(why 在从句作状语)The reason that he tell us is unbelieveable. （在从句作宾语可省）I will never forget the time _ I spend on campus.I will never forget the day _ we first met in the park.There are 36 students in our class, 20 of _are boys.There are 36 students in our class; 20 of _are boys.As 一般引导非限制性定语从句，可放句首而 which 不可以 As is known to all,___二.状语从句;1.时间状语（when,while,as,before,after,since,until）特殊结构：we will leave as soon as it stops raining.Sarcely/hardly had I arrived home when it began to rain.No sooner had the storm started than all the lights went out.2．地点状语（where）3.原因状语（because,for,as since）because 与 because of 区别4 目的状语（so that ,in order that）5.结果状语（so…that,such…that）so +adj+n such+n+adjHe is such a good teacher that everyone ...
