As

prep.
1. 作為,以...的身分
She works as an interpreter in that company.
她在該公司裡擔任翻譯員。
2. 當作
She didn't think much of him as a painter.
她對他作為一位畫家評價不高。
3. 像;如同
The old woman was dressed as a young lady.
這位老婦人打扮得像一位年輕人。