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状语从句时间状语从句课件_图文

时间/条件状语从句是关键 其他状语从句重点记忆连接词 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 用一个句子充当状语成分,那个句子就是状语从句。 ? 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 式,手段,条件,程度,比较,原因,目的, 结果等 1. I get up at 6:00 2. It is dark 3. I get up when it is dark 状语从句分类 1. 表示时间 2. 表示地点 3. 表示原因 4. 表示结果 5. 表示目的 6. 表示条件 7. 表示让步 8. 表示比较 时间状语从句 I was watching TV a--t--t-e-n---o-'-c-l--o-c↓-k--y--e-s-t-e-r--d-a-y. 时间状语 I was watching TV when my mother got home. ---------------↓------------- 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(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。 I’ll write it down before I forget it. 我一到上海就会写信给你。 As soon as I arrive in Shanghai, I will write to you. 我们一直到雨停了才离开。 We didn’t leave until the rain stopped. 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。 I'll ring you up as soon as I get to New York. I will tell him everything when he comes back. He won’t believe it until he sees it with his own eyes. 考查when, while, as引导, 表示“当……时候”。 1.when 的用法 (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, you must be careful. 你( 们)过街道时,一定要小心。(同时) (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: 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) 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) 例:___B_____you smile at others,they will smile back. A Before B When C Until D Though 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。 2.while 的用法 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 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。 例:我吃饭时你可以去游泳。 You can go swimming while I'm 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 likes doing sports. 我喜欢听音乐,而我的兄弟爱好运动。 3. as 的用法 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