问题描述:
i am afraid i have to go now i'd rather you didn't go alone.it is already too late
谁能告诉我为什么要用did not,为什么不是do,为什么用过去式呢
谁能告诉我为什么要用did not,为什么不是do,为什么用过去式呢
问题解答:
我来补答展开全文阅读