Mother's Day is coming.But he hasn't bought a present for hi

Mother's Day is coming.But he hasn't bought a present for his mother yet.
这个现在完成时的句子中为什么能用非持续动词bought?

pppfff0047 1年前已收到2个回答举报

寒交替泪幼苗

共回答了17个问题采纳率：94.1% 举报

因为没有跟for一段时间
不跟时间,就没必要转换成延续性的

1年前追问

pppfff0047 举报

请问不跟时间的现在完成时什么情况下用非延续性动词？

举报寒交替泪

这根完成时并没有关系，只要不跟一段时间的状语，就都用短暂性动词反之，只要跟了时间状语，哪怕不是完成时，也要转换成延续性的，比如 i will be away for weeks

老凌凌幼苗

共回答了1278个问题举报

非持续性动词可用于完成时态中, 只是其肯定句不能同时间段连用.

They have arrived . ( 对 )
They have arrived for 30 minutes . ( 错 )
The film has already begun . ( 对 )
The film has already begun ...

1年前

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