Jack _______ yet last night, otherwise he _______ me.
A. mustn’t have arrived; must have phoned B. can’t have arrived; would have phoned
Jack _______ yet last night, otherwise he _______ me.
A. mustn’t have arrived; must have phoned B. can’t have arrived; would have phoned
B
否定推测要用can’t/couldn’t+…;与过去事实相反的虚拟语气,条件句用过去完成时态,主句用过去将来完成时态,即would/should/could/might+have+p.p.。