7. Not --- until 句型 (1) 陈述句 not --- until --- 直到……才 例：昨晚我11点钟才睡觉。 Last night I didn't go to bed until 11 o'clock. (2) 强调句 It wasn't until…that... 直到……才……. 例： 我直到昨天才收到你的来信.
It wasn't until yesterday that I got your letter.(3) 倒装句 Not until...did... 直到……才……. 例：到我开始工作,我才意识到我已蹉跎了很多岁月. Not until I began to work did I realize how much time I had wasted.