问题补充:
I am too busy now. If I free, I to the cinema with you.
A. am; will go
B. am; would go
C. were; would go
D. was; was going
答案:
A. am; will go
B. am; would go
(答案→)C. were; would go
D. was; was going
解析:C if从句用的是虚拟语气,与现实(很忙)相反时,虚拟语气用一般过去时,be统一用were,主句用would do sth.