答案是didn't这是对过去情况的判断 可以接具体的过去时间点.如果没有过去的时间 .反义疑问 可能会用
hasn't he?
:答案是may I 这是征求意见的 反义疑问 .
答案填if any这是省略的条件状语从句= if there are any mistakes in it.
s这句话的no matte how可以用however替换
she won't give up howeverhard the work is.怎么感觉she won't give up howeverhard the work is 这句话怪怪的呢，呵呵，这是什么结构，之前没看过，可以告诉我吗however是副词 修饰形容词hardhowever hard it is 无论它多难。这是让步状语从句 = no matter howhard引导的让步状语从句