until“直到”,用在肯定句中,句子的谓语动词必须是延续性的。表示某一种行为一直持续到某一时间就结束了。not...until“直到……才”,用在否定句中,主句中的谓语可以是延续性动词也可以是短暂性动词。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。
I studied English until 9 o'clock last night for the coming examination.
为了即将到来的考试,我昨晚学英语一直学到9点钟。(表示9点前一直在学)
I did not study English until 9 o'clock last night.
昨晚我直到9点钟才学英语。(表示9点才开始学)
用法拓展not until 还可以放在句首,句子要采用部分倒装。若把 not until 引导的部分作为强调句型中的被强调部分,则主句中的主谓不倒装。
I didn't go to sleep until he came back.
=Not until he came back did I go to sleep.直到他回来我才睡觉。
It was not until he got out of the car that I recognized him.
直到他从车里出来我才认出他来。反馈9.1We were told that we should follow the main road ______ we reached the central railway station.
A.whenever
B.until
C.while
D.wherever
反馈9.2Not until he left his home ______ how important the family was for him.
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