如果他回答,英文是once answered还是once answers?

题目

如果他回答,英文是once answered还是once answers?
全句是 如果他回答否,那么你就没戏了.【将来时】
【其实我想问的是once he answered no, then...还是once he answers no, then】

答案

从时间逻辑上,和语法上考虑,以下搭配
once he answered no (虚拟,假定/或 在他answered no后立刻)
if he answers no (如果)
as he answered no (由于)
as long as he answers no (只要)