时间状语从句,until和until的用法,分别在什么情况下可以用,顺便举例子

until“直到”,表示某一种行为一直持续到某一时间.用在肯定句中,句子的谓语动词必须是可延续性的.not...until“直到...才”表示直到某一时间,某一行为才发生,之前该行为并没有发生.用在否定句中,主句中的谓语可以是延续性的也可以是短暂性动词.
1.I studied Englis until 9 o'clock last night.
我咋晚学英语一直学到9点钟.(表示9点前一直在学)
2.I did not study Englis until 9 o'clock last night.
我咋晚直到9点钟才学英语.(表示9点才开始学)
3.I waited for five hours until it was dark.I had to give it up.
4.I didn't go to sleep until 11 o'clock
not until 还可以用于强调句中,也可以放在句首,句子要采用部分倒装
5.It was not until he came back that I went to sleep
6.Not until he came back did I go to sleep.