1.语法讲解：
虚拟语气
虚拟语气只用于非真实条件句中，表达假设的或实现可能性不大的情况，通常表达的只是一种愿望、假设、怀疑或是推测。
条件从句时态→ 主句时态
与现在事实相反：一般过去时→ should / would / could / might + 动词原形
与将来事实相反：should.动词原形→ should / would / could / might + 动词原形
与过去事实相反：过去完成时→ should / would / could / might + have + 过去分词
If we left now, we should arrive at the Capital Airport on time.
如果我们现在就走，我们应该可以准时到达首都机场。
If it should rain tomorrow, we would call off the game.
明天万一下雨，我们就取消比赛。
2. 'Will you be staying in England ?'I asked.
“您就待在英国吗？”我问。
知识点：参考上面第8句的分析。
3. "No," she answered.
“不，”她回答。
知识点：参考上面第7句的分析。
4. In despair, I asked her whether she was enjoying her dinner.
失望之中我问她饭吃得是否满意。
知识点：whether在此引出间接引语，作“是否”讲。
