didn't notice 与 wasn't noticing 的区别

didn't notice 与 wasn't noticing 的区别 notice 的用法Jim wasn't ______ when I came inA noticing B seein wasn't和didn't的用法 英语 wasn't.weren't.didn't区别 but they didn't notice wasn't 和didn't怎么用 Kangkang didn't notice Hugh ____(leave). wasn't didn't isn't的用法 各举两个例子 haven't和 didn't的区别 didn't 和couldn't的区别, how didn‘t you notice还是How come you didn't notice never thought与didn't think的区别?