你误解了
现在完成时不用瞬间动词,而应该用延续性动词只是在和for+时间段时才有这样的规定.
瞬间动词可以用完成时的,如过上面是这样的：I have just bought a new bike for a year就不能这样用了.
I have just bought a new bike 这里为什么用bought
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