not until的意思是“直到……才”，結合例句更易理解它的用法，也可以背幾句簡單例句，做題的時候可以融會貫通，不用死記硬背not until的倒裝與強調結構　　1.當Not until位于句首時,句子要倒裝.其結構為:Not until+從句/表時間的詞+助動詞+(主句)主語+謂語+.如:　　①Not until the teacher came in did the students stop talking.直到老師進來學生們才停止講話.　　②Not until next week will the sports meet be held.直到下周才開運動會.　　2. not until的強調結構為:It is / was not until+從句/表時間的詞+that+.　　上面兩句改為強調句為:　　③It was not until the teacher came in that the students stopped talking.　　④It is not until next week that the sports meet will be held.　　直到我結婚的時候,我才有錢買了自己的房子.　　It was not until I got married that I could afford to buy a house of my own