问题描述：
has become 是什么 用法.
John Kent says the deal has become a necessary result of defence .
has,have 后跟的 动词原形,这种用法在VOA听力中出现过多次.
请问这是什么用法?不是完成时态吗?
John Kent says the deal has become a necessary result of defence .
has,have 后跟的 动词原形,这种用法在VOA听力中出现过多次.
请问这是什么用法?不是完成时态吗?
问题解答：
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