七年级英语知识点总结：定语从句

要学定语从句，得知道什么是定语。定语是用来限定、修饰名词或代词的。例如，a good book, good就是定语。那么复合句中修饰名词或代词的从句就叫做定语从句。定语从句由关系代词或关系副词引导，相当于形容词，在句中作定语。被定语从句修饰的词叫先行词，定语从句一般放在先行词的后面。引导定语从句的关联词称为关系词，关系词有关系代词和关系副词。关系代词有that, which, who, whom, whose等，绝对没有what;关系副词有where, when, why,how等。关系词放在先行词和定语从句之间，起连接作用，同时又作定语从句的某个成分。 一、关系代词引导的定语从句 1、由who, whom, that，Whose引导的从句 这些词代替的先行词是人的名词或代词，who作主语指人，whom作宾语指人，that既可作主语又可作宾语(作宾语可以省略)，可以指人也可以指物。Whose 用来指人或物，只用作定语。 (1) Is he the man who/that wants to see you? 他是那个想见你的男人吗?(who/that在从句中作主语) (2) He is the man whom/ that I saw yesterday. 他就是我昨天见的那个人。(whom/that在从句中作宾语) (3) The man whom you spoke to just now is our English teacher 你刚刚说话的那个男人是我们的英语老师 (4) he man whose son is a doctor is our professor. 那个儿子是医生的男人是我们的教授。 2、由which, that引导的从句 它们所代替的先行词是事物的名词或代词，在从句中可作主语、宾语等，作宾语时可以省略，例如： (1) Prosperity which / that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣。(which / that在从句中作主语) (2) The package (which / that) you are carrying is about to come unwrapped. 你拿那个包裹快要散开了。(which / that在从句中作宾语) 注意： 代表物时多用which，但在下列情况中用that而不用which： a)先行词是anything, everything, nothing , none等不定代词时; b)先行词由every, any, all, some, no, little, few, much等修饰时，这时的that常被省略; c)先行词前有序数词或被形容词最高级修饰时; d)先行词中既有人又有物时; e)整个句中前面已有which，who,that时; f)当先行词为物并作表语时; g)先行词为one时; h)先行词同时又被the only,the very,the same修饰时;