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AS, 小单词，大用法!
As and like are often confused since they are both used to compare actions or situations. There are, however, important differences.
as和like经常被混淆，因为它们都是用来比较行为或情况。但是他们有很大的区别。
As
We use as to talk about job or function.
我们用as来谈论工作或者功能。
例：
I worked as a shop assistant for 2 years when I was a student.
He used his shoe as a hammer to hang the picture up.
In comparisons, the structure ‘as adjective as’ is often used.
用于比较的时候，“as+形容词+as”也经常使用。
例：
He’s not as tall as his brother
She ran as fast as she could.
In the following comparisons as is a conjunction – it’s followed by a clause with a subject and a verb.
当as被当做一个连词使用的时候，后面常常是从句带着一个主语或者动词。
例：
He went to Cambridge University, as his father had before him.
She’s a talented writer, as most of her family are.
Like
In the following comparisons, like is a preposition and it’s followed by a noun or a pronoun.
当用于比较的时候，like是一个介词，跟着一个名词或者代词。
例：
I’ve been working like a dog all afternoon.
None of my brothers are much like me.
She looks just like her mother.
Like and As if/As though
Like, as if and as though can all be used to make comparisons. There is no difference in meaning among the 3 forms.
Like, as if 和 as though都可以用来表示比较。这三个词没有区别。
例：
You look as if you’ve seen a ghost.
You talk as though we’re never going to see each other again.
It looks like it’s going to rain.
Expressions with ‘as’
关于as的表达The following expressions all use as.
下面的表达都有用as。
例：
As you know, classes restart on January 15th.
I tried using salt as you suggested but the stain still didn’t come out.
As we agreed the company will be split 50/50 between us.
Their house is the same as ours.
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