as引导让步状语从句表示相同或相似表示不同或对立

as引导让步状语从句表示相同或相似表示不同或对立
一、表示相同或相似
在让步状语从句中,`as`可以表达两个事物之间的相同或相似性,即便存在某种让步或对比。例如:
* She is as tall as her mother. (她和她的母亲一样高。)

二、表示不同或对立
`as`同样可以在让步状语从句中表示两个事物之间的不同或对立。例如:
* He doesn't like coffee, as I do. (他不喜欢咖啡,而我喜欢。)

三、表示时间或条件
尽管`as`主要不用于引导时间或条件状语从句,但在某些情况下,它可以在让步状语从句中表示时间或条件的差异。例如:
* As long as you're here, we can have a chat. (既然你在这里,我们可以聊聊。)
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四、表示让步或假设
在让步状语从句中,`as`最常见的用法是表示让步,即尽管某个条件或情况成立,但结果并不受影响。例如:
* Child as he is, he knows a lot about computers. (尽管他还是个孩子,但他对电脑了解很多。)

五、表示比例或程度
`as`可以在让步状语从句中表示两个事物之间的比例或程度关系。例如:
* She is as smart as her brother. (她和她哥哥一样聪明。)

六、表示方式或手段
虽然`as`不常用来引导表示方式或手段的状语从句,但在某些语境下,它可以表达类似的意思。例如:
* You can cook the fish as I showed you. (你可以按照我教你的方法做鱼。)

七、表示原因或结果
尽管`as`不是引导原因或结果状语从句的首选连词,但在某些情况下,它也可以用来表达原因或结果。例如:
* He didn't come to the meeting as he was ill. (他没来开会,因为他生病了。)

八、表示目的或意图
`as`不常用于表示目的或意图的状语从句。然而,在某些特定的语境下,它可以与`so`等词搭配使用,以表达某种目的或意图。例如:
* He studies hard as to get into a good university. (他努力学习,为了进入一所好的大学。)
需要注意的是,`as`在引导让步状语从句时,其语气通常较为温和,强调一种让步关系,即尽管存在某种条件或情况,但结果或结论并不受影响。此外,`as`引导的让步状语从句通常位于主句之前,并且从句中常使用倒装语序,尤其是当名词或代词作为主语时。例如:
* Child as he is, he knows how to take care of himself. (尽管他还是个孩子,但他知道如何照顾自己。)

改错
1. While I was studying, my roommate came in. (改为用“as”)
2. Because I was late, I missed the train. (改为用“as”)
3. After he finished his work, he went home. (改为用“as”)
4. They sang happily while they were walking. (改为用“as”)
5. If the weather is fine, we will go for a picnic. (改为用“as”)
1. 【改错】While I was studying, my roommate came in. 改为:As I was studying, my roommate came in.
【解析】将while改为as,以强调两个动作的同时发生。
2. 【改错】Because I was late, I missed the train. 改为:As I was late, I missed the train.
【解析】将because改为as,以引导时间状语从句,表示“由于……”。
3. 【改错】After he finished his work, he went home. 改为:As he finished his work, he went home.
【解析】将after改为as,以强调两个动作的同时发生。
4. 【改错】They sang happily while they were walking. 改为:As they were walking, they sang happily.
【解析】将while改为as,以更自然地表示两个动作的同时发生。
5. 【改错】If the weather is fine, we will go for a picnic. 改为三、改错(续)
5. 【改错】If the weather is fine, we will go for a picnic. 改为:As the weather is fine, we will go for a picnic.
【解析】将if改为as,表示“由于天气好,我们会去野餐”。这里的as可以表达原因,使句子更流畅自然。

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