against作为介词主要用以下几种用法。网友可以根据句子意思对号入座。

【1】反对；与…相反；逆；违反

We're playing against the league champions next week.下周我们要和联赛冠军队比赛。

We were rowing against the current.我们划船逆流而上。

That's against the law.那是违法的。

She was forced to marry against her will.她被迫违心地嫁了人。

Are you for or against the death penalty?你赞成还是反对死刑？

She is against seeing him.她不想见他。

I'd advise you against doing that.我劝你别做那事。

【2】对…不利

The evidence is against him.证据对他不利。

Her age is against her.她的年龄对她不利。

【3】紧靠；倚；碰；撞

Put the piano there, against the wall.把钢琴放在那儿，紧靠着墙。

The rain beat against the windows.雨点击打着窗户。

【4】以防

They took precautions against fire.他们采取了防火措施。

Are we insured against theft?我们保了盗窃险没有？

【5】以…为背景；衬托

His red clothes stood out clearly against the snow.他的红衣服在白雪中格外显眼。

The love story unfolds against a background of civil war.这爱情故事以内战为背景展开。

【6】和…相比;和…对比；对照

You must weigh the benefits against the cost.你一定要权衡利益与成本二者的得失。

Check your receipts against the statement.核对你的收据与结算单是否相符。

Check the operator's productivity against agreed targets.根据既定目标检验操作员的效率。

What's the rate of exchange against the dollar?与美元的兑换率是多少？