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.

问题描述:

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.

用现在完成时里动词用been表示动词不延续或表被动

现在完成时句子中没有实意动词时 在形容词前+have been

busy是形容词,你想想i am busy .那been 对应的am ,好好琢磨下

这里这个been是短语be busy with 里的be 应用完成式