核心问题
You might at least offer to help! 请问上句中的 might 具有什么意义？
词典解答
might at least 常常用来表示唠叨、指责或埋怨。上面句子的意思是:你至少应该给予帮助啊！类例: You might(at least) clean the bathtub after you've used it! (LEG) 你用过浴盆之后,(至少)应该洗刷干净才是。
might have guessed 见 may have done/might have done
might have known 见 may have done
might have suspected 见 may have done/might have done