i have been felling better since the doctor came 时态的用法

i have been felling better since the doctor came 时态的用法 解释一下该句子的时态Since he came here last year, we have been happy.解 I have been here since 1976.请教been(be)的用法. I have been sick since yesterday.中have been 是什么是时态为什么要用been. I am not felling very well.I____to see the doctor. - John,you have never been to the great wall since you came came China since to we have used life here we been the to 怎样 you have never been to the Great Wall since you came to chin have been的时态. I have just been to I have got a bad cold A.the doctor B.the the best place I have been to多种时态的英语作文 请问这里有错误吗?Since I came to the United States, I not only have