not until的句型,是前面倒装还是后面倒装?

问题描述:

not until的句型,是前面倒装还是后面倒装?

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.