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:①Not until the teacher came in did the students stop talking.直到老师进来学生们才停止讲话.②Not until next week will the sports meet be held.直到下周才开运动会.
not until we finished our work did he come
not until midnight did he return 2.not until的强调结构为:It is / was not until+从句/表时间的词+that+.上面两句改为强调句为:③It was not until the teacher