do Not until 和 do until 的区别？

在do后面加not表示否定，这两个词组是反义词

do not until后面的句子要用倒装，而do until则不用。例如：
直到你回来之前我都不会离开。
Not until you come back will I leave.
Util you come back I will not leave.
I will not leave until you come back.