not…until的用法知识点

    not…until是一个短语，用来表示某事将不会发生，直到一个特定的时间或事件。not…until通常与非延续性动词连用，当其位于句首时，句子要倒装。
    
    not…until的用法有哪些
    not until的倒装与强调结构，not until通常与非延续性动词连用，强调主句所表示的状态或情景从until所表示的时间才发生，主句必须是否定句。
    1、当Not until位于句首时，句子要倒装。其结构为：Not until+从句/表时间的词+助动词+（主句）主语+谓语。
    Not until the teacher came in did the students stop talking.
    直到老师进来学生们才停止讲话。
    2、not until的强调结构为：It is/was not until+从句/表时间的词+that。
    It was not until the teacher came in that the students stopped talking.
    直到老师进来了，学生们才停止了说话。
    not until的例句
    1、Not until I began to work did I realize how much time I had wasted.
    直到我开始工作,我才认识到了我已蹉跎了几多岁月.
    2、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。
    3、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。
    4、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。