He’s not such a fool as he looks. 他并不像看上去的那樣愚蠢。

He is not such a man as would leave his work half done. 他并不是一個(gè)做事半途而廢的人。

You must show my wife the same respect as you show me. 你必須對(duì)我妻子表現(xiàn)出與對(duì)我同樣的敬重。

He smokes as expensive a cigarette as he can afford. 他抽一種他買得起的最貴的煙。

2. 用于引導(dǎo)非限制性定語從句，根據(jù)情況可位于主句之前或之后，有時(shí)也可插在主句中間，其意為“這件事”“這一點(diǎn)”。如(www.yygrammar.com)：

He is late, as is often the case. 他遲到了，這是經(jīng)常的事。

As is usual with children, they soon got tired. 孩子們一貫如此, 他們很快就厭倦了。

David, as you know, has not been well lately. 大衛(wèi)最近身體不太好，這你是知道的。