这两句话怎么改成虚拟语气?

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?
英语人气:729 ℃时间:2020-06-17 09:51:35
优质解答
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.
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