小升初网整理了2017年小升初英语语法大全，供同学们参考，希望能够帮助同学们提高学习成绩。
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。
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。