对not…until句式的强调有固定的句型，即It is / was not until…that…如： It was not until yesterday that I noticed it. 直到昨天我才注意到此事。http://yingyu.chazidian.com It was not until I saw Mary that I felt happy. 直到见到玛丽我才高兴起来。 It was not until you had explained how that I managed to do it. 直到你给我解释了理由，我才会做的。 It was not until she took off her dark glasses that I realized she was a famous film star. 直到她取下墨镜，我才意识到她是一位著名影星。 It was not until I met you that I knew real happiness. 直到我遇到你以后，我才真正体会到幸福。 It was not until you had explained how that I managed to do it. 直到你给我解释了理由，我才会做。 请看两道题： (1) It _______ we had stayed together for a couple of weeks _______ I found we had a lot in common. A. was until; when B. was until; that C. wasn’t until; when D. wasn’t until; that 答案为D。此题考查not…until…句式的强调形式——It was not until…that…的用法。注意不要想当然地将其中的that换成when。 (2) It was not until she got home _______ Jennifer realized she had lost her keys. A. when B. that C. where D. before 答案为B。考查not…until…的强调形式，其基本结构为it was not until….that…形式。