不总是这样。

Not always.

You always work late. (你总是工作到很晚啊。)

Not always. (不总是这样。)

不是那样。

Not really. *不能同意对方的意见或信息时，有礼貌地加以否定。

Do you want to go out for dinner? (你想不想去外面吃晚饭?)

Not really. (不太想去。)

Was it fun? (有意思吗?)

Not really. (不怎么有意思。)

It must be expensive. (这个一定很贵吧!)

Not really. (也不那么贵。)

Not especially.