关于假设语气的句子.老师1.万一明天下雨,比赛将会延期.If it should rain tomorrow ,the

1. 第一句如果使用虚拟语气,则为：
If it should rain tomorrow, the game would be put off.
或：If it rained tomorrow, the game would be put off.
或：If it were to rain tomorrow, the game would be put off.
如果使用陈述语气,则为：
If it rains tomorrow, the game will be put off.
2. 第二句如果使用虚拟语气,为：
If it should rain tomorrow, we would cancel the picnic.
或：If it rained tomorrow, we would cancel the picnic.
或：If it were to rain tomorrow, we would cancel the picnic.
如果使用陈述语气,则为：
If it rains tomorrow, we will/shall cancel the picnic.
3. if引导的条件状语从句使用虚拟语气时,如果是对将来的情况虚拟,则
1）if从句谓语由“should + 动词原形”或“were to + 动词原形”或使用一般过去时；
2）主句谓语由“would/could/should/might + 动词原形”构成.
4. 其实楼主所举的这两个例句不用虚拟语气也可以,用不用虚拟语气除了和过去/现在的事实相反之外,更多还是看说话人的语气问题.
如果说话人觉得把握不大,可能就使用虚拟语气；
如果语气较为肯定,则可以直接使用陈述语气.