failed.
failed=not succeed
不成功,失败failed是过去式还是形容词？是动词的过去式 原型fail为什么需要过去式，上文不也是do吗？
many people try to climb the mountain but do not succeed
many people try to climb the mountain but do not succeed
=many people try climbing the mountain,but they____
=many people try climbing the mountain,but they____
英语人气：602 ℃时间：2019-08-20 16:24:48
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