时间状语从句的三道选择题目

1.A 强调动作发生的迟缓性应选before
2.D 第2题表动作未及发生就发生主句动作也应选before
3.D 强调动作发生的迟缓性应选before
4.A 强调句应选A项
.一、在下列情况下，两者可互换用，但含义略有不同。before表示“在……之前”的意思，强 调时间先后关系；而until表示“直到……才”的意思，主句是肯定句则表示主句动作的终止时间；主句是否定句则强调主句动作的起始时间。
1.主句为否定式终止性谓语动词。常见的动词是open,start,leave,arrive,finish,stop等。
(1)The noise of the street didn't stop until/before it was midnight.
(2)The children won't come back until/before it is dark.
(3)I didn't leave the lovely boy until/before his mother came home.
2.主句为肯定式、延续性谓语词，这类动词用stand,stay,talk,be,wait等。
(1)He lived with his parents until/before he graduated from school.
(2)I will wait until/before he comes to my help.
(3)I shall stay heer until/before you come back.
二、在下列情况下，用before不用until。
1.主句这肯定式、终止性谓语动词，只用before。例：
(1)He fell asleep before I could take off his clothes.
(2)We arrived there before it atarted to rain.
(3)The holiday came to the end befor I knew it.
(4)He almost knocked me down before he saw me.
2.主句谓语动词强调动词的迟缓性，只用before，常伴有时间段状语或时间段暗示。例：
(1)It was quite some time before he found the elephant at all.
(2)We had walked a long way before we found some water.
(3)We had sailed for two days before we saw the land.
(4)The fire lasted about four hours before the firefighters could
control it.
(5)It was midnight before my brother came home.
(6)It was three months before they met again.
3.如果强调从句谓语动作未发生，就发生主句谓语动作，只用before。常译为“未及”，“不”或“不等……就”。例：
(1)We can leave early in the morning before it gets too hot.
(2)I must write it down before I forget it.
(3)We do want to buy something now before prices go up.
4.表“与其说……倒不如”，“与其……毋宁……”只用before。例：
(1)I would give up my job before I'd agree to be dismissed.
(2)He will die of hunger before he will steal.
5.在某些特定句型中用before。例如：
(1)It was not long before the whole country rose up.
(2)It will probably not be long before they understand each other.
三、下列情况一般区别用until。
1.主句是持续性谓语动词时，肯定、否定都可以，但意义完全不同。肯定表动作终止，而否定表动作开始。例如：
(1)We discussed the problem until/before he came back.我们一直讨论到他回来。
(2)We didn't discuss the problem until he came back.我们一直等到他回来后才讨论问题。
2.not…until句型尽管在某些情况下可与before互换用，但在强调句中一般仍用until。
(1)It was not until he told me that I knew it.
(2)It was not until he finished his homework that he went home.

1.A 句子意思为在他完成他的写作之前他将花6个小时刻苦钻研。
2.B 根据题意，应该是我还没能下来之前，自行车就撞到了树上。
3.C Until “直到……为止”，意思为我敲门敲了超过五分钟怀特先生才回应。
4.A It is/was not until……that……“直到……才”，直到昨天他才直到那个秘密。也是一个强调句型，强调的时间，把强调句型去掉句子仍然成立。Yesterday he knew the secret..

教你一招 ，before 句型的辨别 1 翻译成 后 2 肯定句 能翻译成 才。。
第一题 。他将花费 六个小时 才能把作业写完。
答案 A before
第二题 车撞倒树上后，我才下车。
答案B 。before
第三题 我敲门敲了5多分钟后 ，怀特夫人 才应答。
答案D before
第四题 是强调句 答案A 直到昨天 他才知道 这个秘密。
这是 not.....until....句型的 强调句形式。
注意这与上边的不一样 。这是否定句。