语法检测-文法精讲：" before"用法
编辑：pitaya02 日期：2020-11-05
在高三课本第十五单元， INTER GATING SKILLS和 WORKBOOK READING章节中，将有以下句子：
⒈The shop was successful，but it was about sixty years before people started to buy jeans for fashion as well as for work.
⒉However，it probably will not be long before the other mountainous areas of China such as Sichuan，Xinjiang and Yunnan are developed，and as more facilities become available，prices will almost certainly fall.
这里介绍了 before的用法，下面概括了它的用法。火龙果智能语法检测
1.可作介词
(a)指时间早于(…之前)；
She has lived here since before the war.
自从战争开始，她就住在这里。
㈡指位置位于前面，例如：
We knelt down before Grandma's grave.
我们跪在奶奶的墓前。
㈢是指在下列情况下的顺序或排列：
Your name comes before mine on the list.
你的名字列在我的前面。火龙果智能语法检测
(a)面对某人，例如：
She said it before the witness.
在目击者面前，他说了这些话。
2.连词形式
它的基本含义是“先于……”，并可根据不同的语境灵活地翻译为“才”、“当”、“当”、“当”、“当”等等。使用方法如下：
a)与情态动词 can/could连用
此时小句虽然是肯定句，但按照汉语的表达习惯，翻译成“还未来得及”，例如：
Before I could get in a word，he had measured me.
在我可以插嘴之前，他给我量好了尺寸。火龙果智能语法检测
Before she could move，she heard a loud noise，which grew to a terribl eroar.
在她能迈出一步之前，她听到了一声巨响，接着是可怕的轰鸣。
在肯定句中用来强调主句所表达的时间、距离或费时费力的意思，翻译为“Yes”
We had sailed four days and four nights before we saw lands.
在看见陆地之前，我们已经航行了4天4夜。
We waited a long time before the train arrived.
在火车到达前我们等了很久。
在否定句中，强调主句表达的时间、距离短，或耗时少，译成"不到…就"等。
We hadn't run a mile before he felt tired.
他跑完一英里后就感到累了。
当主句包含 hardly、 scarcely等半否定副词时，可译为"刚…就…"
此时主语句应用过去完成时态，从语句使用过去时，也可以使用 when替换 before，例如：
We had scarcely reached the school before/when the bell rang.
到达学校时，铃响了。
(五)有时还有"宁可"
伊德shoot myself before I apologized to him.我宁死不屈，从不向他道歉。
㈥用于 t+ be/take+时间段+ before句型
该句型可按主从句的时态又可分为两种情形。
如果主句是一般将来时，那么从句是一般现在时；如果主句是肯定句，那么它意味着“要花很长时间”；如果主句是否定句，那么它意味着“花不了很长时间”。
It will be two weeks before everything returns to normal.
在两个星期后，一切都会恢复正常。
It will be many years before the situation improves.
也许需要很多年的时间这种情况才能得到改善。
“我爱你”，“我爱你”，“我爱你”，“我爱你”，“我爱你”，“我爱你”。
此时若主句是一般过去式，从句也是一般过去式。如果主句是肯定句，则译为“过了多久才”；如果主句是否定句，则译为“不久就”。例如：
It was some time before I realized the truth.
很久以后，我才知道这件事的真相。火龙果智能语法检测
It wasn't long before she became a brave solider.
不久，她便成为一名英勇的战士。
After that it still took seven years before they got married.
过了七年他们才结婚。
注：当主句的谓语动词是延续动词时，动词和 until有时可以互换。It was an hour before/until the police arrived
·巩固运动
⒈(2004天津)It was evening ________ we reached the little town of Winchester.
Athat B.until C.since D.before
2.(2004全国)Several weeks had gone by ________ realized the painting was missing.
A. asB.be foreC.si nce
3.(2005广东)The America Civil War lasted four years ______ the North won in the end.
A. af terB.be fore C. whenD.th en
4.(2005山东)It was some time _______ we realized the truth.
B. when B. untilC.si nceD.be fore
5.(2006四川)-Why didn't you tell him about the meeting?
-He rushed out of the classroom _______ I could say a word.
A. be fore B. until C. whenD.af ter
6.(2006福建)-How long do you think it will be __ china sends a manned spaceship to the moon?
-Perhaps two or three years.
Awhen B.until C.that D.before
引用： DBBDAD
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