had to 后面接什么时态语法解释
had to是在英语里面是经常使用的一个词组，那么你知道had to后面接什么时态的词吗?下面是小编为你整理的had to后面接的时态，希望对你有所帮助!
had to后面接的时态
had to：不得不
had to是一般过去时态 后加动词原形, had to do sth.意为不得不做某事，必须做某事
had to 与 must have been的区别
had to强调不得不,有被迫的意思,must have been是主观的必须去做,自愿
had to的例句
I had papers relating to the children which my wi
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