He said he would help me with my math if he ____ free.

He said he would help me with my math if he ____ free.
A,was B,would be C,is 选哪个?问什么?
英语人气:609 ℃时间:2019-10-19 17:07:33
优质解答
He said he would help me with my math if he _was___ free.本句为虚拟语气,与现在事实相反.
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