I have been (looking for) my lost keys,but I haven't found them till now括号中为什么要用looking for

I have been looking for a man. You are the one I have been looking for! She is the p i have been looking for. Since he left after I have been looking for living. where ____?i am looking for everywhere A.have you gone B.have you been That‘s e__ what I need!I have been looking for it for a long time Where you （ ）be I （ ）look for you all afternoon.为什么填have you been和have been looking this is a very boy that i have been looking for如何翻译 Mr.zhang is the man for whom I have been looking这句有什么错?为什么? You are the one I have been looking for 怎么读啊,额.发英要标准啊, what i have been looking for歌舞青春的,求介绍.最好有点感想. You are the happiness that I have been looking for all the 寻歌,歌中有如下歌词:I have been looking for you,tell me you know me too. Since he left after I have been looking for living.是什么意思? The film star when I have been looking forward to hasn't turned up.为什么要加been i've been here for about half an hour.have you been looking for me请翻译成中文 高一必修3英语：The letter i（ ）hasn‘t arriwed yetA.was looking forward toB.am looking forwardC.have been looked forwardD.have been looking forward to Where____you_____,john?I'm looking for you everywhere.选项：A.have；been B.have；been to C.have；gone D.did；go to