1、八年级英语上册Unit1从句基础知识讲解一、什么是从句从句是相对于主句来说的,一个简单句一般分为:3大类1、主+谓+(宾)+(补)结构,2、主系表结构3、there be 结构一个独立的简单句就是一个主句,从句是复合句中不能独立成句的部分,从句是包含一个限定动词,但不构成一个完整的句子的一组词,它在所属的长句中,或作为一个名词,一个副词,一个形容词,或者包含从属于它的一个或更多的从句,或被这个或这些从句所修饰,或和另一相等的从句相结合。二、从句的分类按从句充当的句子成分的词性,从句可以分为名词性从句,形容词性从句或者叫定语从句,副词从句或者叫做状语从句。从句在句子中做什么成分就是什么从句。句子
2、和句子之间要用连词来连接,所以学习从句就是学习连词。连词:并列连词 and but or so 并列句从属连词 :属于从句,从句类型不行,连词不同。定语从句 连词包含连接代词、连接副词连接代词,缺少名词时候用连接代词代替名词 who whom which that as whose连接副词 不缺少名词时用 when where why先行词就是被修饰的词1.名词性从句连接代词:who whom what which whose 连接副词:when where why how关系连词:whether if 是否as if 好像as thoughbecause 因为that 无意义 不做成分 有的
3、地方可省略,有点地方不可省略2.状语从句【时间状从】beforewhen(while,as) until since once (as soon as)before*It was/is/will be 时间段 before we did/do sth翻译为:在之前/过多久才when 、whilewhile+持续性/时间段 都翻译为:当时asas:当时,随着until翻译为:直到,常见not until since翻译为:自从,后接过去式as soon as翻译为:一就1. It is/was +时间点 when*当发生时,时间为2. It is/was/will be +时间段 before
4、*过多久,才能3. It is/has been +时间段 since*自已有多久【地点状从】Wherewherever翻译为:在的地方【原因状从】Because as since for【结果状从】sothat, such that, so (如此以至于,因此)【条件状从】if, once, as/so long as 如果/只要unless 除非【目的状从】so that, in order that以便于in case, lest, for fear that以防【让步状从】although, though, as, even if/though, while,although陈述语序t
5、hough 陈述语序,倒装语序as 倒装语序【方式状从】as, like, as if, as though, the way【比较状从】asas, than A is to B what C is to D*倍数的表达方法:A is 倍数+asas B.This building is twice as tall as that one.A is倍数+比较级+than B.This building is twice taller than that one.A is倍数+ the+ n.+of B.This building is twice the height of that one.
6、三、核心句式I suppose everyone has something they dont like about themselves. 我想每个人都有不喜欢自己的地方。(I suppose.;省略关系代词that的定语从句)With so many people around me, my birthmark burned red hot. 周围人很多,我感觉自己的胎记火辣辣的。(“with+名词+介词短语”作原因状语)Although I only repliedthank you, it turned sunny in my heart. 虽然我只回答了一句“谢谢”,但我的内心变得阳光明媚起来。(although引导让步状语从句)I havent told Maddie yet how she has changed me.我还没有告诉玛迪她是如何改变我的。(含现在完成时的否定句)I have already learnt that I am what I am.我已经明白了,我就是我。(含现在完成时的肯定句)Nothing is impossible as long as you try and stick to it. 只要你尝试并坚持下去,没有什么是不可能的。(as long as引导条件状语从句)2