__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

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__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

因为be able to 是一个固定搭配,表示 能够,有能力..

be able to to sth 能 会……