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初中阶段英语需要掌握的从句有哪些?

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初中阶段英语需要掌握的从句有哪些?
关键是朱,谓关系以及一些相应的关键词
再问: 相应关键词指什么?
再答: 有三大类 1.名词性从句 2.定语从句 3.状语从句 名词性从句中分: 1.主语从句:例,it is important to read book.(形主it作主语,真正的主语是to read book) that air has pressure was known long ago.(关联词that引导的句子that air has pressure作主语从句) 2.宾语从句:I think it necessary that he should do his homework.(形式宾语it引导的) I'm sure that my test will succeed.(sure后用that引导的宾从) 3.表语从句:系动词后的从句 it may be as you say(be是系动词,后面用as引导的) this is that he is too young to go to school.(有系动词is,后面由that引导的表语从句) 4.同位语从句:同位语从句是对前面名词的解释说明,如: The facts that he had done his homework.(事实就是he had done his homework,是对前面the facts的解释,是什么事实) 定语从句:在句子中起定语作用,修饰剧中的名词或代词的从句叫定从 例:the man (who is shaking hands with my father) is my teacher.(括号中就是定从,修饰限定the man) BeiJin is a city (which has a long history).(括号中是定从,修饰the city) 状语从句:在复合句中担任状语成分的从句叫状语从句 例:I will tell her about that (when i see her). 为时间状从 just stay (where you are).为地点状语 Because he is ill,he is absent today.为原因状语 这也很局限,其实要讲的还很多,你可以多看看语法书之类的