No, no, No

勿───Don't;勿───Don't

You don't know the facts, so keep your mouth shut!───你不了解情况, 别多嘴!

Don't provoke him to anger.───别招他生气.

Keep your nose clean, and don't get involved.───你要安分守己, 不要卷到那里头去.

I don't object to the children going with us.───我不反对孩子们和我们一道去.

Don't be beforehand in making up your mind.───不要过早作决定.

Don't leave me behind.───不要把我忘了.

Don't eat rotten apples.───不要吃腐烂的苹果.

I don't want to go for a walk on such a hot day — it's too much like hard work for me.───我不想在这样的大热天去散步——我简直吃不消.

Don't halloo till you are out of the wood. 

Never (or Don't) trouble trouble till trouble troulbes you. 

Don't teach your Grandma to suck eggs. 

Don't bite the hand that feeds you. 

Don't climb a tree to look for fish.