He said he would help me with my math if he ____ free.A,was B,wou_英语解答

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?

人气：150 ℃　时间：2019-10-19 17:07:33

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.