Ⅰ. hands up 是一句祈使語氣的口語，相當于Put up your arms over your head! “舉起手來!”如：

　　① “Hands up, or I’ll shoot.” The policeman demanded the robber. “舉起手來，不然我開槍了。”警察命令搶劫犯。

　　Ⅱ. put up one’s hand 意思與hands up 相同。但語氣要弱得多。如：

　　① Who knows the answer? Hands up / Put up your hands, please. 誰知道這個答案?請舉手。

　　② Put up your hands if you have any question.如有問題請舉手。