重要

until

/ʌnˈtɪl/📚 1375 103 5中考高考
If something happens until a particular time, it happens during the period before that time and stops at that time. 直到…为止

conjunction [推进连词]到…时,直到…为止

I waited until it got dark. 我一直等到天黑。

preposition [方式和原因]到…时,直到…为止;直到(某处)

Until 2004, she lived in Canada. 到2004年为止,她一直住在加拿大。

until 出现在下面的课文中
Lesson 077&78 Terrible toothache until 介词: 直到……为止
Lesson 2 Breakfast or lunch? until 介词: 直到
Lesson 49 The end of a dream
Lesson 59 In or out?
Lesson 67 Volcanoes
Lesson 68 Persistent
Lesson 70 Red for danger
单词造句:

用于表示动作、状态等的持续

“一直到……为止”或“在……以前”

肯定句中

它与表示持续性状态的动词连用,表示持续到某一时刻:

  • I’ll wait here until 5. 我会在这里等到 5 点钟。
  • His father was alive until he came back. 直到他回来为止,他爸爸都是活着的.

否定句中

它通常与描述短暂动作的动词连用,表示“到……为止”、“直到……才”:

  • She cannot arrive until 6. 她到 6 点才能来。
  • His father didn't die until he came back. 直到他回来,他爸爸才死.

until(后的从句)的时间终止之前,这个动作做了还是没做?做了前面的主句用肯定;没做前面的主句用否定。

把until 作为时间终止线

从句的时间终点之前,这个动作做了还是没做?

  •  做了——肯定;
  • 没做——否定.