1. have the (an) advantage over (of) 优于，比……占有优势。如：

He has an advantage over me for he knows some French. 由于他懂点法语，所以比我的条件有利。

You have the advantage over (of) me in experience. 你经验比我丰富。

有时用动词 gain, get 等。如：

They gained an advantage over the enemy. 他们比敌人占优势。

2. take advantage of

(1) 利用(机会、时机等)。如：

They took advantage of the fine weather to play tennis. 他们利用好天气去打了网球。

(2) 利用(某人的处境、弱点等)。如：

He always took full advantage of the mistakes made by his rivals. 他总是充分利用对手所犯的错误。

(3) 欺骗(某人)，捉弄(某人)，占(某人的)便宜。如：

He has always been taking advantage of me. 他老是在占我的便宜。

3. to sb’s advantage对某人有利。如(from www.yywords.com)：

The present world situation is to our advantage. 目前的世界形势对我们有利。

It will be to your advantage to study abroad. 出国学习将对你有利。