A: Mr. Chapman, can I hand in my homework next time. I left it at home.
先生，我能不能下次再交作业呢? 我把功课忘在家里了。
B: All of the scores must be given to the office by Friday, so you must have your homework today. It is a school rule and there is nothing I can do. My hands are tied!.
所有的分数都必须在礼拜五前交到办公室，所以你今天必须交作业。这是学校的规定，我无能为力。
"My hands are tied." 并不是真正的“手被绑起来”的意思，而是指“没办法”的意思。比如电话响了，你很忙不能接，也可以说"Can you get it? My hands are tied." (我很忙，你能接一下吗?"）