not until什么意思？not until的用法时态

   今天小编要给大家介绍的是not until，下面跟着小编来看看not until意思及用法时态吧！

     not until意思是 直到...才；在...以前不

    双语例句：
    1.It was not until he got seriously ill that he knew the importance of health.
    直到他生了重病，他才知道健康的重要。

    2.It was not until a few months later that he knew the story.
    直到几个月后，他才知道这故事。

    3.Not until a few months later did he know the story.
    直到几个月后,他才知道这件事。

    4.Not until his friend offered to help could he do it.
    他的朋友帮助他，他才有办法做那事。

    5.Not until last night did I get the news.
    直到昨晚我才听到这消息。

    6.I don't know whether we will start the job or not until I see how the land lies.
    在没有分析情况之前，我不知道是否要开始这项工作。

    7.Not until eleven o'clock did he come home.
    他到十一点才回家。

    8.It was not until he came that I left.
    直到他来我才离开。

    用法：
    1.当Not until位于句首时,句子要倒装。结构为:Not until+从句/表时间的词+助动词+(主句)主语+谓语+.如:
    ①Not until the teacher came in did the students stop talking.
      直到老师进来学生们才停止讲话.
    ②Not until next week will the sports meet be held.
      直到下周才开运动会.

    2.not until的强调结构为:It is / was not until+从句/表时间的词+that+.
     上面两句改为强调句为:
    ③It was not until the teacher came in that the students stopped talking.
    ④It is not until next week that the sports meet will be held.

      直到我结婚的时候,我才有钱买了自己的房子.
  　It was not until I got married that I could afford to buy a house of my own.