状语从句时间状语从句ppt课件.ppt
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1、状语从句是如何出题的?,时间/条件状语从句是关键,其他状语从句重点记忆连接词,什么是状语?,什么是从句?,状语是修饰动词、形容词、副词等的句子成分。说明时间、地点、原因、目的、结果、条件等。可作状语的有:名词、副词、介词短语、不定式短语和从句等,必须符合“从句的三个必须”必须是句子;必须有连接词;必须是陈述句,什么是状语从句?,用一个句子充当状语成分,那个句子就是状语从句。,I get up,at six,when it is dark.,I get up,at school,where I study.,状语从句状语从句同副词,介词词组等作状语一样,用于修饰谓语,说明谓语动作的时间,地点,方
2、式,手段,条件,程度,比较,原因,目的,结果等 I get up at 6:00It is darkI get up when it is dark,状语从句分类,表示时间 表示地点 表示原因 表示结果 表示目的表示条件表示让步表示比较,返回,时间状语从句,I was watching TV at ten oclock yesterday.I was watching TV when my mother got home.,-,时间状语,-,时间状语从句,时间状语从句的引导词:when(当时候), while(当时候), before(在之前), after(在之后), till/ until
3、(直到), as soon as (一就), as(当时,一边,一边), since(从以来), by the time (当时候)等引导。,在忘记之前,我要把它写下来。我一到上海就会写信给你。 我们一直到雨停了才离开。,We didnt leave until the rain stopped.,As soon as I arrive in Shanghai, I will write to you.,Ill write it down before I forget it.,在时间状语从句里,当主句是一般将来时,从句用一般现在时。 Ill ring you up as soon as I
4、get to New York. I will tell him everything when he comes back. He wont believe it until he sees it with his own eyes.,考查when, while, as引导,表示“当时候”。,(1) when 意为“当时”,“在.之后”,引导的时间状语从句表示主句的动作和从句的动作同时或先后发生。如:,I feel very happy when you come to see me.你(们)来看我时,我感到很高兴。(先后)When you are crossing the street,
5、you must be careful. 你( 们)过街道时,一定要小心。(同时),1.when 的用法,(2)when 引导的时间状语从句中,可以用延续性动词,也可以用短暂性动词。如:,Someone knocked at the door when I was sleeping. 当我正在睡觉时,有人敲门。(延续性动词),I will visit my good friend when I arrive.当我到达时,我将去看望我的好友。(短暂性动词),例:_you smile at others,they will smile back. A Before B When C Until D
6、 Though,B,注意:when 也可以作并列连词,表示一个动作正在进行的时候,突然间发生了另外一件事。如:,I was fishing by the river, when someone called for help.我正在河边钓鱼,就在那时有人求救。,We were working in the chemistry lab, when the lights went out.我们正在化学实验室工作,突然灯都熄灭了。,while 意为“当时”“在期间”,引导的时间状语从句表示主从句的动作在同一时期发生,常用延续性动词或表示状态的词。如:,They rushed in while we
7、were discussing problems.当我们正在讨论问题时,他们冲了进来。Father was cleaning the car while I was playing computer games.(while表示两个动作同时发生)当我正在玩电脑游戏时,爸爸正在清洗汽车。,2.while 的用法,例:我吃饭时你可以去游泳。,You can go swimming while Im having lunch.,注意:while 也可以作并列连词,表转折的关系,相当于but,译为“然而”。如:,I like listening to music, while my brother l
8、ikes doing sports.我喜欢听音乐,而我的兄弟爱好运动。,as 引导时间状语从句时,意为“正当,一边.一边,随着”等意思(1)表示某事一发生,另一事情随即发生 As the sun rose the fog disappeared. 太阳一出来雾都消散了(2)表示某事发生的过程中另一事发生. As he was speaking there was a loud explosion. 正当他在说话的时候,出现了一声巨响.(从句用进行时态) I heard the murmur of their voices as I crossed the hall. 我走过大厅的时候听到他们在
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