你不是英语怎么说

No,you are not.(not you)
all of you are not!

No,you are not, every of you are not!

you are not, all of you are not

You are nothing./You are nobody.
两句一样,以上两种说法均可。
因为“你”和“你们”在英语里都是YOU。所以两句一样。
如果一定要强调“你们”
可以说：You all are nothing/nobody.

You aren't!
You are all not!