你应该不经常上MSN, 这句话怎么翻译?

You are not supposed to be using MSN very frequently.

shouldn't是不应该,和应该不有点区别

一个是情态动词，一个是表推测。。

well..
its a lil complicated
but why u guyz wanna use shudnt here ?
its too wierd
we just use very simple language like
"you dont come on MSN a lot,do you?"

well,but if you have to use this word.it cud be
"you shudnt have come on MSN a lot!!!!,haven u?"
yes it works