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    • peter was so tired that he didnt wake up until...

    peter was so tired that he didnt wake up until...为什么wake不用过去式呢？是因为前面的是过去式所以就不能用了吗？

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    推荐答案   2016-10-07
    并不是。。。不用过去式是因为前面有didn't，一般助动词后面要接动词原形！
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    其他回答
    第1个回答  2016-10-07
    didnt wake
    一般过去时否定形式：didn't+动词原形
    第2个回答  2016-10-07
    因为过去式用在了助动词do上面 也就是前面的didn't他的原型其实是don't
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