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He usually gets up at 6 o'clock in the morning ,but he had t

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He usually gets up at 6 o'clock in the morning ,but he had to get up very early yesterday morning..
He usually gets up at 6 o'clock in the morning ,but he had to get up very early yesterday morning because he wanted to catch a train.
这里的get为什么不用过去式got?
catch为什么不用过去式?
because he wanted to catch a train.
这里的catch为什么不用过去式?
He usually gets up at 6 o'clock in the morning ,but he had t
第一个是have to 后接动原 固定搭配
第二个是动词不定式后接动原
不知道对不对- - 英语忘记蛮多了