__were___you able to play the violin when you were five?为什么这个用were呀.不用could 和would呀有赏

__were___you able to play the violin when you were five?为什么这个用were呀.不用could 和would呀有赏 be able to 用法 being able to be able to中文 able to be assigned not able to be able to be able to (送分拉) 请问：be able to be able to 意思 be able to 和will be able to 的区别 为什么是NOT BEING ABLE TO而不是NOT ABLE TO? be able to 和 able to的区别 是be able to 还是is able to No one加be able to,还是is able to? be able to open it be able to 的用法 be able to的用法