have been playing是什么意思

have been playing是什么意思 I have been playing piano for ten years.同义句I have been playing piano____ten years____ have+been是什么时态 You look so tired .yes,I have been playing basketball I have been playing是主谓结构吗? 这个是什么类型的虚拟语气if she would have been playing the game,she would have had both boys on her team 英语中have been；has been是什么? have been working 是什么时态 have been to是什么时态? 英语高手帮忙分析一句话A great deal of time was wasted playing but ought to have been fully used.句子成份?这里but是什么用法? 英语翻译How long have you been playing?It is so beautiful up there. How long have you been()playing basketball?为什么填practicing 为什么是ing形式 we have been students ,since we were playing改为一般疑问句 I have been playing with the dog.(提问）____ _____ you ______ _______? the children may have been playing in the garden.哪个是助动词 修饰语 实义动词? I have been playing the piano since I _(be) 6 years old.填was,been,还是其他的什么? have gone to 与 have been to ,have gone ,have been的区别是什么 They have fun playing football.的同义句是什么?