2019年6月大学英语六级听力口语关键句(78)
I didn't realize my mistake until I entered the office.
点睛
not...until句型使用广泛,表示“(不)……直到”。其中,not可以省略。如:
Wait until tomorrow. 等到明天。
考点归纳
与not...until句型类似的是till,二者用法的区别比较微妙,需要特别注意:
当主句是否定句时,意思是“直到(某时)(某动作)才(发生)”,这时候常会使用not until的结构;如果将not until结构放在句首,那么主句要用倒装形式。如:
1) He didn't go to sleep until 12 last night. 他昨晚直到12点钟才睡觉。
2) Not until we pointed out their fault to them did they realize it. 直到我们指出他们的错误,他们才意识到。
当主句是肯定句时,意思是“直到(某时某动作停止了)”,这时候常会使用till。如:
1) The students made much noise till the teacher came into the classroom. 直到老师走进教室,学生们才停止了吵闹。
2) Don't open it till your birthday. 等到你生日那天再打开。
另外,until可以放在句首,而till则不行。如:
1) Until they used up all their money, the young couple were very happy. (√)
2) Till they used up all their money, the young couple were very happy. (×)
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