这两句话怎么改成虚拟语气?
问题描述：
这两句话怎么改成虚拟语气?
He can't draw very well
His grandma is in delicate health.
这没有从句咋改,自己加么?
答
He couldn't draw very well if he didn't keep on studying.
His grandma might be in delicate health unless she did some proper exercises .
自己加从句.