It was not until his third match in 1790 这里为什么要用not until用until不也可以吗？

It was not until his third match in 1790 that he finally beat Humphries and became Champion of England. not until和until意思有什么差别？这里的not until去掉not不是也可以吗？It was until his third match in 1790 that he finally beat Humphries and became Champion of England. 求解

It was not until his third match in 1790 that he finally beat Humphries and became Champion of England.
not until和until意思的区别：
前者是‘’直到。。。才。。。‘’，后者是’。。。一直到。。。‘’。

until表示的意思是‘在。。。之前’即until后面的情况一出现，until前面的情况立即停止或反过来。
所以 这里的not until去掉not不可以。
本句是not。。。until。。。的 强调句型=he didn't finally beat Humphries and became Champion of England until his third match in 1790.
楼上回答正确，not 。。。until。。。须用终止性动词。

beat与became是非延续性动词 行为动词是延续性的用until，如果是非延续性的用not until He didn't leave until 10 o'clock. (leave是非延续性动词) He waited for her until 10 o'clock. (wait是延续性动词) 再看看别人怎么说的。