not until the early years of the 19 century ___ what heat is.

Question

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，谢谢！！！

Answer 1

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+谓语的其他成分+其他)

比如:

Not until he finished his work,did he go home.
(=He did not go home until he finished his work.)
Not until yesterday,had he known the truth.
(=He hadn't known the truth until yesterday.)
Not until the year of 2100,can he pay off his debt.
(He can not pay off his debt until the year of 2100.)本回答被提问者采纳