On no account should you do it!你无论如何也不应该这么做呀！

今天的几个句子还是有关表达警告的：1. Be aware of the bad guys! 当心那些坏家伙。2. Be on guard against the pickpockets! 当心扒手！3. In no circumstances must you forget it!不管怎样你也不该忘记呀！