notuntil的用法是:
一、not...until的基本结构
基本结构是:not主句+until+从句。例句:We did not get off the busuntil it stopped.直到车停了,我们才下了公交车。
二、not...until的强调句结构
强调句结构是:It is / was not until+从句/表时间的词+that+主句。
1、not until后边一般是时间点,如:It was not until five o'clock in the afternoon that they finished their work. 直到下午五点他们才完成工作。
2、not until后边也可以是陈述的句子,如:It was not until he got sick seriously that he realized the value of a healthy body. 直到他生重病,他才意识到一个健康体魄的价值。
3、not until后边还可跟介词短语,如:It was not until after Friday that I got his reply. 直到星期五之后,我才得到他的答复。
三、not...until的倒装句结构
倒装句结构:Not until+从句+倒转的主句(主倒从不倒)。not until引起的时间状语置于句首时,句子的主谓应部分倒装。由 not until引导的时间状语从句位于句首时,主句应部分倒装,从句语序不变。例句有:
1、Not until 1998 did he return to his hometown.直到 1998 年他才回到家乡。
2、Not until Father came back did we begin to have supper last night.昨晚直到父亲回来,我们才开始吃晚饭。