not until基本结构：not主句+until+从句；倒装句结构：Not until+从句+倒转的主句(主倒从不倒) ；not until后边还可跟介词短语。not until可接延续性动词和暂短性动词，指的是“直到...才”的意思。
not…until的用法是什么
一、not until可接延续性动词和暂短性动词.
指的是“直到...才”的意思，如：
I did not go home until my mother called me.
二、not until的倒装与强调结构
1、当Not until位于句首时,句子要倒装.其结构为:Not until+从句/表时间的词+助动词+(主句)主语+谓语+.如:
Not until the teacher came in did the students stop talking.直到老师进来学生们才停止讲话
Not until next week will the sports meet be held.直到下周才开运动会
2、not until的强调结构为:It is / was not until+从句/表时间的词+that+.
not…until的例句
People say:“ Guilin's scenery is peerless in the world." It was not until I visited the place that I found it really worthy of the reputation.
人们都说“桂林山水甲天下”，到桂林一看，果然名不虚传。
Not until they heard that she was safe and sound were their minds set at rest.
听到她平安无事的消息，大家心里才一块石头落地。
It was not until morning that the sheer scale of the damage could be seen.
直到早晨才看清了损害的严重程度。
