- 单词解释
- 用法辨析
- 常用短语
- 英英解释
- 相关例句
- 中考考点
- 高考考点
- and,or,but,for
and, or, but, for均属连词中的并列连词，是连结单词、短语、从句或句子的虚词， 在句子中不单独作句子成份。
1）连接并列的词与词，短语与短语，句子与句子。
[例]
Rice and potatoes are common foods. (词与词)
Today we can travel by plane. (短语与短语)
Many trees lose their leaves in winter, but evergreen trees do not. (句子与句子)
2）关联连词是一类成对使用的连词
如：both……and……, not……but…… ，not only……but also…… not only…but… as well
either……or…… neither……nor……
关联连词必须后接同样的语法结构。
如：Either the windows were opened or the door was opened.
3）从属连词 如：that, whether, when, because, though 等， 用以引导名词性从句和状语从句。 从属连词引导的从句不可以被断成一个句子。
如：When the alarm clock rang. （不完整）
4） though (although)引导让步状语从句，because 引导原因状语从句， 所以though(although)不能和并列连词but ，because 不能和并列连词 so一起使用，只能单独使用。
中考复习中我们还应注意到：
(1) 表示选择关系的连词，连接的双方只取其一。常用连词有or, either...or, otherwise 例如：
1)You can go to Beijing either today or tomorrow.
2)You must get up early or you won’t catch the early bus.
(2) 表示转折关系，连接的双方构成对比，意义上有转折。常用连词有but, however, while, only 例如：
1) His brother is fond of football while he likes basketball.
2) You can watch TV, but you must finish your homework first.
(3) 表示联合关系，联合的双方是对等的，意义上趋向一致。常用连词有：and, both...and, neither...nor, not only...but also, as well as, together with 例如：
1) To study English well, we need both diligence and careful.
2) That horse is not only the youngest among the five, but also runs the fastest.
(4) 表示因果关系，连接的双方，互为因果，或者前因后果，或者前果后因。常用的连词有：for, so, therefore 例如：
1) It must have rained, for the ground is wet.
2) You are in the right, therefore they should support you. - 更多相关短语..
- more or less
[中考]有点 - sooner or later
[中考]迟早 - give sb. sth. or give sth. to sb.
[中考]给某人某物 - an hour or so
[中考] 大约一小时 - or rather
[高考]更精确地说，倒不如说 - or so
[大学]约莫,大约…左右 - or else
[大学]否则,要不然 - early or late
[大学] 迟早 - first or last
[大学] (古)迟早，早晚 - come hell or high water
无论困难多大 - common or garden
adj.平凡的 - by hook or by crook
千方百计地,不择手段地 - give or take
v.允许有...的小误差 - or circuit
【计】 "或"电路 - a state in northwestern United States on the Pacific
[同] beaver state , or , oregon - a room in a hospital equipped for the performance of surgical operations
[同] operating room , operating theater , operating theatre , or , surgery
[例]
great care is taken to keep the operating rooms aseptic - 更多相关例句..
- To deprive of strength or vigor;weaken.
减弱力气或力量;使虚弱 - A dilute or weakened condition.
稀释稀释或变弱的状态 - The stoppage of bleeding or hemorrhage.
止血阻止流血或大出血 - We can go by tube or we can catch a bus.
我们可以乘地铁或乘公共汽车。 - To reduce to or organize according to a method;systematize.
使有条理使条理化或按照一定条理来组织;使系统化 - Statues are molded out of clay or bronze.
雕像是用粘土或青铜塑[铸]成的。 - A serum-filled blister formed in or beneath the skin.
疱在皮肤里或下层的一种满含血清的水疱 - An alley or lane is a narrow street between buildings.
alley和lane均指小街或小巷. - To crush together or press into wrinkles;rumple.
挤压挤在一起或压出皱纹;弄皱 - Meal made from oats;rolled or ground oats.
燕麦制品燕麦制成的膳食;燕麦片或燕麦粉 - 中考综合测试题 数词
Which is bigger, the sun _______ the moon?
A.or
B.and
C.but
D.so
请选择您的正确答案 - 中考综合测试题 数词
Lucy has seen the film, _______ Lily hasn't.
A.and
B.or
C.but
D.so
请选择您的正确答案 - 中考综合测试题 数词
Hurry up, _______ we will miss the train.
A.but
B.and
C.or
D.so
请选择您的正确答案 - 中考综合测试题 数词
Study hard, _______ you're sure to have a good result in the exam!
A.but
B.and
C.for
D.or
请选择您的正确答案 - 2008年河南中考模拟试题
Hurry up, _____ you will miss the class. It’s only ten minutes left.
A.and
B.so
C.however
D.or
请选择您的正确答案 - 2008年全国II高考真题
Stand over there ___ you'll be able to see the oil painting better.
A.but
B.till
C.and
D.or
请选择您的正确答案 - 2005年北京高考真题 状语从句
Lose one hour in the morning ___you will be looking for it the rest of the day .
A.but
B.and
C.or
D.so
请选择您的正确答案 - 2007年湖南高考真题
Reality is not the way you wish things to be, nor the way they appear to be, _________ the way they actually are.
A.as
B.or
C.but
D.and
请选择您的正确答案 - 2005年辽宁高考真题 连词的用法
Follow your doctor’s advice, __________your cough will get worse.
A.or
B.and
C.then
D.so
请选择您的正确答案 - 2007年北京高考真题
You have failed two tests.You'd better start working harder,____you won't pass the course.
A.and
B.so
C.but
D.or
请选择您的正确答案
