1.because of 因为，由于；基于

He was not a particularly good shot because of his eyesight.
他视力不好，算不上是一个出色的射手。

The man was known to the police because of previous convictions.
因为有犯罪前科，警察们都认识这个人。

2.refuse to 拒绝

The District Council made a weekly collection of refuse.
区政务委员会每周收取一次垃圾。

James, I should refuse that consultancy with Shapiro, if I were you.
詹姆斯，如果我是你，我就会拒绝向夏皮罗咨询。

3.ask for 请求…；要求

That was Nicholas's cue to ask for another chocolate chip cookie.
那表示尼古拉斯还想要一块巧克力曲奇。

I decided to go to the next house and ask for food.
我决定去隔壁那家要点吃的。