as 用作连词有什么使用方法
as 用作连词使用方法如下：
1、表示随着
意为“伴随”。如：
As time passed, things seemed to get worse. 伴随时间的推移，状况好像变得更糟了。
若其后不接从句，而接名词，则用介词 with 表示“伴随”。如：
With the development of modern agriculture and industry, more and more waste is produced. 伴随现代工农业的进步，污染愈加紧急了。
2、表示让步
意为“虽然”“尽管”，要用于倒装句（等于 though，但语气稍弱）。如：
Boy as he was, he behaved like a girl. 他虽然是个男生，但举止却像个女生。
Much as I like you, I couldn’t live with you. 我尽管非常喜欢你，却不可以和你一块生活。
Try as he would [might]，he couldn’t open the door. 他试过多次了，却仍打不开门。
3、表示时间
意为“当……时候”。如：
He dropped the glass as he stood up. 他站起来时，把杯子摔了。
As I was coming here, I met your brother. 我来这里时碰到了你的弟弟。
注意，as 引导时态状语从句时，其谓语动词一般只能是动作动词，而不可以是静态或状况动词。如：
她出生后不久爸爸妈妈双亡，是由姑母抚养大的。
误：Her parents died as she was a baby and she was brought up by her aunt.
正：Her parents died when she was a baby and she was brought up by her aunt.
4、表示缘由
引导缘由状语从句时，其谓语动词可以是动作动词，也可以是状况动词。如：
As you weren’t there I left a message. 由于你不在那里，我留了个信儿。
另外，引导缘由状语从句，可用以下如此的倒装语序。如：
Tired as she was, I decided not to disturb her. 由于她累了，我就决定不打扰她了。
Writing hurriedly as she was, she didn’t notice the spelling errors. 由于写得仓促，她没注意其中的拼写错误。
