帮助划分句子成分I have just been to Shanghai

帮助划分句子成分I have just been to Shanghai I have been to Shanghai I have never been to shanghai.( ) ( )she I have never been to shanghai.________? I have been to shanghai 什么时态 请问一下I have been to shanghai have been to shanghai i have been to shanghai为什么加been? i have been to Shanghai?和i have been Shanghai?哪个对?请详解. -Have you been to Shanghai? I have been to shanghai,I__________there last month I have ever been to Shanghai改成否定句