We form unreal future conditionals like this:
If…did/should/were to…, …would/should/might do…
Practice:
1) 假如我要出国,我就会去法国。
If I were to go abroad, I would go to France.
2) 万一明天下雨,我们明天就不上学。
If it should rain tomorrow, we would not go to school.
一、一般条件句中虚拟语气的用法