Use as in comparisons in the expression as ... as, with an adjective or adverb in between: as 用于表示比较的短语 as ... as,中间是形容词或副词
Basketball is as popular as football here. 在这里,篮球与足球一样流行。
He can’t sing as well as his brother. 他歌唱得没他弟弟好。
As is also used after be the same (age/size etc): as 还用于 be the same (age/colour 等)之后
He is the same age as me. 他和我同年。
Do not use as on its own before a noun or pronoun in comparisons. Use like: 比较形式中的名词、代词前不要用单独的 as,要用 like
A movie is not like a book. 电影和书不一样。
Like other people, he values his privacy. 同其他人一样,他也看重自己的隐私。
n ✗ Don't say:
A movie is not as a book. | As other people, he values his privacy.
Use as if/as though before a clause describing an imaginary situation: as if/as though 之后接从句,用于把真实的情形比作虚设的情形
He talked to them as if they were children. 他同他们说话的口气就像他们是孩子。
Some people also use
like in this way, although this is often considered to be incorrect:
在这种比较中,有些人用 like。然而有些人认为这种用法不正确。They act like they own the place. 他们表现得像是这地方的主人。
Do not use as if/as though directly before a noun. You say: as if/as though 后面不能直接跟名词, 应该说:
5You treat them as if they were your parents (NOT 不说 as if your parents).你对待他们如同自己的父母。
nYou treat him as if he were your servant.
n ✗ Don't say: You treat him as if your servant.