'didn't used to do sth' 为什么前面用了过去式后面还用used?
'didn't used to do sth' 为什么前面用了过去式后面还用used?
英语:“used to do sth”的过去式是“didn't use to do sth”吗?
用be used to do sth.造句
用be used to do sth 造句
用"used to do sth"造句
用be used to do sth造句
used to do sth.
used to do sth
you used to be short,didn't you?为什么用didn't you?
used to do sth 是过去常常做某事的意思、 do 要不要用过去式?例 he used to get up g
used to 过去常常.是过去式,可有一句话he didn't used to.存在吗/
used to do中used是不是过去式,如果后面跟一个and再接一个动词,那这个动词是不是要用过去式呢,请高赐教