I have been sick since yesterday.中have been 是什么是时态为什么要用been.

I have been sick since yesterday.中have been 是什么是时态为什么要用been. The sick have been crued we have been worried sick about you sick I am terrible ,I think ------sick.Awill be Bam going to be C have been Dhad been为什么 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. i _______for three hours when i suddenly became sick.A.had been working B.would work C.have worked D.am working I have been selling I have been trying I have ever been I too have been I have been to. I have been I have been in. Your I have not been unable to breathe 是什么意思?Your I have not been unable to breathe 和You get sick heavily是什么意思呢?麻烦大家帮我翻译一下.谢谢了. the sick ( ) been cured and the lost ( )been foundA.HAS HAVE B.HAVE HAS C.HAVE HAVE .D.HAS HAS 答句是I have a headache .I feel sick.问句是 i have a sick和 i am sick意思一样吗? have与get的一道题I have been sick quite a few times just because I can not ___to the could weather in the south.为什么答案是get used,have used为什么不行啊.