compare to 还是 compare with?

compare to 表示将什么比作什么
compare with表示将什么与什么作比较
如: 将水比作一面镜子
Compare the water as a marrot.
将我与你作比较
Compare you with me.

compare to 将……比（喻）作……
compare with与……做比较

The poets often compare life to a river.
诗人们经常把生活比喻成长河．
My English can't compare with his.
我的英文水平不如他．

两个都有
COMPARE TO 是把什么比做什么
COMPARE WITH 是把什么和什么比较