Jim ______speak two foreign languages when he was only twelve.为什么填was able to不填could?Jim ______speak two foreign languages when he was only twelve.为什么填was able to不填could?

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Jim ______speak two foreign languages when he was only twelve.为什么填was able to不填could?Jim ______speak two foreign languages when he was only twelve.为什么填was able to不填could?
Jim ______speak two foreign languages when he was only twelve.为什么填was able to不填could?
Jim ______speak two foreign languages when he was only twelve.
为什么填was able to不填could?

Jim ______speak two foreign languages when he was only twelve.为什么填was able to不填could?Jim ______speak two foreign languages when he was only twelve.为什么填was able to不填could?
前者表示经过后天的努力,后者表示与生俱来.

was able to强调具有能力
could 能,can的过去式

Jim 【was able to】speak two foreign languages when he was only twelve.
could通常不是can的过去式,而是表示一种婉转语气
要表示过去时的能够,通常用【be able to do sth】
有不会的可以再问我