肯定句: I slept until midnight. 我一直睡到半夜时醒了。来源:考试大 Wait till I call you. 等着我叫你。 (在肯定句中可用before代替 Let s get in the wheat before the sun sets.)
否定句: She didn t arrive until 6 o clock. 她直到6点才到。来源:考试大 Don t get off the bus until it has stopped. 公共汽车停稳后再下车。 I didn t manage to do it until you had explained how. 直到你教我后,我才会做。
1)Until可用于句首,而till通常不用于句首。 Until you told me, I had heard nothing of what happened. 直到你告诉我以前,出了什么事我一点也不知道。 2)Until when 疑问句中,until要放在句首。 ---Until when are you staying? 你呆到什么时候? --- Until next Monday. 呆到下周一。
注意:否定句可用另外两种句式表示。 (1)Not until …在句首,主句用倒装。 Not until the early years of the 19th century did man know what heat is.来源:考试大 直到19 世纪初,人类才知道热能是什么。 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 is not until… that…