英语：“used to do sth”的过去式是“didn't use to do sth”吗?不好意思啊，是否定式。

used to do sth. used to do sth used sb.to do sth.的回答 used to do sth 的否定式 英语：“used to do sth”的过去式是“didn't use to do sth”吗?不好意思啊，是否定式。 一个英语问题：was used to doing sth是不是就等于used to do sth? used to do sth. 意思 be used to do sth. Be used to do sth Be used to doing sth 后者的to为何做介词? 英语句型区分be used to do Sthused to do Sthbe used for doing Sth be used to doing sth.和used to do sth.的分别 used to do sth.和used to doing sth.的区别,可举例说明! 用I used to do sth.but now.写一篇关于兴趣爱好的英语作文 这几个词组有什么不同?(英语)(1) be used to do sth.(2) be used to doing sth.(3) used to do sth. use的用法.used to do sthbe used to do sth be used to doing sth be used for be used by “习惯于...”用英语怎么说?“习惯于...”用英语怎么说?是be used to do sth.还是be used to doing sth. sb used to do sth.它的否定形式是什么? used to do sth.的中文意思是什么?