I have been busy yesterday afternoon为什么要用have been busy而不用have busy
主要想问的是什么时候现在完成时里动词前要用been,也就是have been ...
例如还有 ：She has been sick since last month.
人气：155 ℃ 时间：2019-08-19 05:12:14
解答
busy是形容词,你想想i am busy .那been 对应的am ,好好琢磨下
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