Shan't / shouldn't

Shan't / shouldn't shan't和shouldn't 的区别 为什么shall not缩写不能是shouldn't而是 shan't? 什么时候用shan't? shan't的原型 shan't的用法? 英语翻译you shouldn't work [ ] [ ] [ ]. shouldn't的肯定形式 people shouldn`t _____ energy 填空 Shouldn't play______the street 用shouldn't造句4 should 和 shouldn't 分别+