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②一般过去时的特殊用法
a)在虚拟语气中表示现在或将来时间的动作或状态。
It's time we went.
该是我们走的时候了。
I wish I were twenty years younger.
但愿我年轻20岁。
I would rather you didn't do anything for the time being.
我宁愿你暂时先不要采取什么措施。
b)在口语中，一般过去时往往显示委婉客气。
I wondered if you could give me a hand.
我想请你帮个忙。
Might I come and see you tonight?
