一般過去時的特殊用法
a)在虛擬語氣中表示現(xiàn)在或?qū)頃r間的動作或狀態(tài)。
  It's time we went.
  該是我們走的時候了。
  I wish I were twenty years younger.
  但愿我年輕20歲。
  I would rather you didn't do anything for the time being.
  我寧愿你暫時先不要采取什么措施。
b)在口語中,一般過去時往往顯示委婉客氣。
  I wondered if you could give me a hand.
  我想請你幫個忙。
  Might I come and see you tonight?
  我想今晚來看你,好嗎?