1、用作动词动词：打开门，经营、开办
open a door/window/a small shop/one’s hand/one’s eyes/one’s mouth/fire开门/开窗/开一家小商店/张开手/睁开眼/张开嘴/开火；
be opened to traffic通车；
The whole railway line has been opened to traffic.
这条铁路已全线通车。
The railway was opened to traffic last year.
这条铁路是去年通车的。
turn on the light;开灯
turn on the tap开水龙头
turn on the TV开电视机
operate a machine;开机器
The road will be opened again in a few hours after police have cleared it.
待警察清理完以后，道路在几小时内就会重新开放。
open up开采（发）
Now, he opens a small factory of his own.现在他自己办了个厂。
Open the door, please! 请开门！
Could I trouble you to open the window, please?
劳驾，请您把窗户打开好吗？
Mr Chen opened the car door for his wife.
陈先生为妻子打开车门。
但是：打开车窗，要说：
roll the car window down
He rolled down his window and stuck his face out
他摇下车窗，把头探了出去。
He rolled his window down and gave the man the money.
他把窗户摇下来，把钱递给这个男人。
He backed up a few feet and rolled the window down
他往后倒了几英尺，然后摇下车窗。
偶尔窗户的玻璃开关是两边扒的那种，也用：
Please open the train [ car] window a bit [ crack; fraction].
请把这车窗打开一点点。
《汉英大词典》
open a debate展开辩论
open a park开放公园
open a new store
开设一家新商店
也可以作为不及物动词：a shop/store, business, etc. 商店、企业等开始营业；开业；开门
What time does the bank open?
这家银行什么时候开门？
The company opened its doors for business a month ago.
该公司一个月前开业。
The new hospital opens on July 1st.
这家新医院七月一日开诊。
All shops open at nine o’clock in the morning.
这些商店上午九点开始营业。
He has worked there since the store opened in 2020.
自从那家商铺2020年开业以来，他一直在那里工作。
I open up the store for the day at around 8.30.
我的店每天早上大约8:30开门。
Banks closed on Friday afternoon and did not open again until Monday morning.
银行星期五下午关门，直到星期一上午才营业。
The original station opened in 1754.
最初的车站于1754年落成。
A photographic exhibition opens at the Royal College of Art on Wednesday.
星期三一个摄影展在皇家艺术学院开幕。
They are planning to open a factory in Eastern Europe
他们计划在东欧开办一家工厂。
以上“开业”都是强调动作，如果强调的是一种状态的“开”，用be open，如：
All shops are open all the day.所有商店都是全天开门。
The new store will be open in the spring.
新商店将在春天开业。
We’re open from 8 to 7 every day.
我们每天从早8点至晚7点营业。
The show will be open to the public at 2pm; admission will be 50p
演出下午两点开始，入场费50便士。
Only some bookstores, hospitals and gas stations may be open.
只有一些书店、医院和加油站可以营业。
The door was open and on impulse she went inside.
门开着，她一时心血来潮就走了进去。
If the pool was open, we’d in all probability still be swimming in it
如果游泳池还开着，我们完全可能还在里面游泳。
Our telephone lines are open during normal office hours.
我们的电话在正常办公时间一直开通。
We are open during normal office hours.
在正常上班时间内，我们都开放。
They are open outside normal daily banking hours.
它们在银行正常营业时间以外开放。
The Gardens are open from 10.30am until 5pm.
公园从上午10点半到下午5点之间开放。
Our branches are open from 9am to 5pm during the week and until 12 noon on Saturdays.
我们的分行每周一至周五上午9点到下午5点营业，周六营业到中午12点。
Its beautiful gardens and parkland are also open to the public
它漂亮的花园和绿地也向公众开放。
The flowers are all open now.
花现在都开了。
The park is open from 1 May to 31 October.
公园从5月1日到10月31日开放。
The museum is open daily throughout the year.
这个博物馆一年到头每天都开放。
The museum is open all year round.
博物馆全年开放。
The castle is open daily from May to October inclusive.
这个古堡从五月起每天开放，直至十月底。
The park is open during daytime.
这个公园日间开放。
The club is open to all and sundry.
这个俱乐部什么人都可以加入。
The snack bar is open during the day.
小吃店白天营业。
The Visitor Centre is open daily 8.30 a.m. – 4.30 p.m.
游客中心每日上午8:30至下午4:30开放。
The arena livens up only on Saturdays and Sundays when a flea market is open there.
只有在周六周日跳蚤市场开市时，这片场地才会热闹起来。
2、用作形容词,表状态，”开着的”：
keep open开着门；
be open开门、开业；
cut…open切开；
leave the door open 开着门；
in the open air 在野外；
an open secret公开的秘密；
keep one’s eyes open睁眼
Don’t keep the door open.
别让门开着（即：请把门关上）。
She had difficulty keeping her eyes open .
她连睁开眼睛的力气都没有了。
She had left the door wide open .( closed)
她把房门敞开着。
3、be open to对……开放
Many school libraries are open to children on Sundays.
不少学校的图书馆周日给孩子们开放。
4、训练题
①John was so sleepy that he could hardly keep his eyes________.（高考试题)
A.open B.to be opened
C.to open D.opening
②Some new oilfields ________since 1976.
A.were opened up B.has been opened up
C.have been opened up D.had been opened up
③The computer center, _________ last year,is very popular among the students in this school.
A.open B.opening
C.having opened D.opened
Key:①A ②C ③D
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