花店利润怎么样:I have been to shanghai 为什么have不用过去时

I HAVE Never Been To Me I have been to shanghai 什么时态 请问一下I have been to shanghai 请问一下I have been to shanghai I have been to England什么意思 I have been to shanghai 为什么have不用过去时 I have been asked to have the tree cut down. I have been to park with a friend_____ i have never been to me是啥意思哦？ i have been looking forward to meeting you 这句话是什么句型？尤其是HAVE BEEN我不懂