不许讲话的英文

有很多种情况，一般在公共场所的标志为：No talking.生气不礼貌时用：Shut up! 礼貌用语：Be quiet. Keep silence.或者可以用：Don't talking. Don't speak.

No talking allowed during class.

不允许讲话 - no talking那向老师提问，或回答老师的提问，不讲话吗？你是说不准私底下交谈吧chit-chatting is not allowed in/during class

“No one's allowed to talk!”准确些吧 ；如果是小学的话就用“Don't speak ”就行啦。

do not speaking in the classroom