not until the early years of the 19 century ___ what heat is.A.man did know B.man knew C.didn't man know D.did man know请高手为我讲下not until...的用法,not...until我知道怎么用,但是not until...我不清楚,请高手讲下,我将感激不尽,
问题描述：
not until the early years of the 19 century ___ what heat is.
A.man did know B.man knew C.didn't man know D.did man know
请高手为我讲下not until...的用法,not...until我知道怎么用,但是not until...我不清楚,请高手讲下,我将感激不尽,
答
这个题选D.Not until...和...not ...until...的意思都是一样的.用法上Not until 位于句首,主句采取部分倒装.部分倒装就是把谓语部分的操作词移到主语前.结构是:Not until+从句/时间,主语(助动词/情态动词+主语+谓语...