作业帮英语里not……until怎么用啊
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英语里not……until怎么用啊
英语里not……until怎么用啊
英语里not……until怎么用啊
Don't get off the bus until it stops.(主句是祈使句从句用现在时）
He didn't go to bed until his mother came back.（主句是过去时,从句时态一致）
He won't call you until he finishes his work.(主句用一般将来时,从句用现在时）当主句是否定句时,它引出的意思是"直到（某时）（某动作）才（发生）" ,这时候常会出现"not until …"的结构,如果将 "not until …"的结构放在句首,那么主句要写成倒装句.例如：
He didn't go to sleep until 12 last night .
他昨晚直到十二点钟才睡觉.
They didn't realize their fault utill we pointed it out to them .
直到我们向他们指出了他们的错误,他们才意识到.
Not until we pointed out their fault to them did they realize it .
直到我们向他们指出了他们的错误,他们才意识到.
1.用于肯定句中：
1) It may last until Friday.这可能要延续到星期五.
2) He will be working until 5 o'clock.他将一直工作到五点钟.
3) She was a bank clerk until the war,when she trained as a nurse.她战前是个银行职员,战时受训当了护士.
不难看出until 用于肯定句中,表示句子的动作一直持续到until短语所表示的时间为止,即表示动作的终点.一般可译为“直到……时(为止)”或“在……以前”.在这种用法中,句子的谓语动词必须是持续动词(非瞬间动词),如live,wait ,last,love,like,stay,work,continue 等.
2.用于否定句中：
1) The secret was never told until after the old man's death.这个秘密在老人去世后才说出来.
2) Don't open it until your birthday.等到你过生日那天再打开.
3) She didn't sleep until eight.她八点钟才睡觉.
一般译为“直到……才”或“直到……之前(……还不)”