You shouldn't spend money foolishly. 你不该随便乱花钱。 You have an attitude problem. 你的态度太恶劣了。 Don't be so naughty. 别那么没有礼貌。 Hold it down! 请安静! Hush! 嘘!(安静!) It's too noisy. 太吵了。 Don't make a fool of yourself. 别丢人现眼了! Think about where you are. 分清场合。 Act your age. 你也不看看你多大了。 Your view is too optimistic. 你想得也太天真了。 You should get your head out of the clouds. 你的想法太不现实了。 Don't make such stupid mistakes again! 别再重复这种愚蠢的错误了。 Don't be stuck-up. 别那么自命不凡。 Don't judge a book by its cover. 人不可貌相。 Watch your tongue. 说话要留神。