I have been busy since yesterday.
问题描述:
I have been busy since yesterday.
我从昨天就很忙
为什么不写成 I have been busied since yesterday.
这里句子的成分你搞错了
这里不是主谓宾,而是主系表
原来是 i am busy
这里是将am变成完成时,就成为了I have been busy
am就是动词,系动词
答
2楼的错啦~busy是形容词,不可能像动词那样变形,LZ原来的是对的