1.be over中的over是形容词，表示“结束”，相当于finished，指某件事本身已经结束。
They are hoping for a return to normality now that the war is over.
既然战争结束了，他们希望一切都恢复常态。
The long summer vacation is over.
漫长的暑假结束了。
The bad times were over
倒霉的日子过去了。
The programme is over.
节目已经完了。
Don't leave before the meeting is over.; Don't leave when the meeting is in progress.
开会不要中途退场。
They'd come soon, perhaps when the radio broadcast was over.
他们很快就会来，可能在广播结束之后。
We all breathed a sigh of relief when it was over.
事情过去后，我们大家都松了一口气。
I am very relieved that it is over
这件事结束之后我感到轻松极了。
Would they trash the place when the party was over?
聚会结束时他们会把这地方搞得一团糟吗？
All too soon the party was over.
转眼之间，聚会就结束了。
The worst of the storm was over.
最厉害的一阵风暴过去了。
The affair is over now. 这件事现在已经了结了。
The meeting was over when I got there. 我到达那里时，会议已经结束了。
The lights are extinguished as soon as the news conference is over.
新闻发布会一结束，灯光就熄灭了。
Warplanes that have landed there will be kept until the war is over
降落在那里的战斗机将一直扣留到战争结束。
Most consumers seem unconvinced that the recession is over
大多数消费者似乎都不相信经济衰退已经过去。
For this year at least, our race to circumnavigate the globe in less than 80 days is over.
至少今年，我们80天内环游地球一周的比赛已经结束了。
Traffic cannot pass through the square until the mass meeting is over.
群众大会结束后，广场始能通行。
It did not require a great deal of perception to realise the interview was over.
并不需要多少洞察力也能意识到面试已经结束了。
The play was over before we would fully enjoy it.
这场戏我们还没有尽情欣赏就结束了。
When the ceremony was over he was most impatient to have a private talk with us.
仪式一完，他就急不可待地与我们单独进行了会谈。
The game was over in only six moves.
这盘棋只走了六步就结束了。
When the performance was over, the people crowded out.
演出结束后，人们涌了出来。
Hallelujah! College days are over!
万岁！大学时代结束喽！
Junior high school days are over. I'll miss all of my teachers.
初中时代结束了。我会想念我所有的老师的。
The children who were spoon-fed consumerism have discovered that the years of excess are over. 曾被填鸭式地灌输了消费主义思想的孩子们发现无节制的时代已经结束了。
He only came out of hiding ten years after the war was over.
战争结束十年之后他才露面。
I gradually awakened to the realization that our marriage was over.
我逐渐意识到我们的婚姻结束了。
In the evening I returned to tell Phyllis our relationship was over
晚上我回来告诉菲莉丝我们之间完了。
Our budding romance was over.
我们刚刚开始的恋情结束了。
2.be up表示时间上的结束，意为“完结的，耗尽了”，如规定某次演讲一个小时，一个小时的时间到了，就是time is up。还有一个意思：事情搞砸了，某事弄糟了，出事了
Now time is up. Class is over. 现在时间已到，下课。
When the five weeks was up，everybody was sad that he had to leave. 五个星期满了，大家都为他终将离去而感到难过。
The moment the half-hour was up, Brooks rose
半个小时一到，布鲁克斯便起来了。
The time is up.
期限已到。
The time is up. Let's go quickly.
到点了，快走吧！
I could tell something was up by the looks on their faces.
从他们的脸色我就知道出事了。
Mr. Gordon stopped talking, and his friends knew something was up.
戈登先生突然闭口不言，他的朋友们知道有哪儿不对劲了。
He knew his game was up. 他知道他的把戏完了。
Environmental groups are up in arms about plans to sink an oil well close to Hadrian's Wall.
环保组织极力反对在哈德良长城附近打油井。
The Cornish are up in arms.
康沃尔人表示强烈抗议。
提示
be up还可表示“已提出（供讨论），准备好的，建成的，火了，流行起来；上涨；由……负责；未睡（起床），兴致高”等。
The matter is up for discussion. 这件事已提起讨论。
The whole question of school curriculum is up for discussion.
涉及学校课程的全部事项都已提出供大家讨论。
He told reporters today that the president's trip to Moscow is up in the air.
今天他告诉记者们总统是否前往莫斯科尚未确定。
“Tea is up！” shouted Mary. “茶准备好了！”玛丽叫唤着。
The new house hasn't been up long. 新房子才建成不久。
The box office takings are up on last week.
票房收入较上星期有所增长。
Sales are up by roughly 10%.
销售额上升了大约10%。
Tourism is up, jobs are up, individual income is up.
旅游火了，工作机会多了，个人收入涨了。
On the foreign exchanges, the US dollar is up point forty-five.
在外汇交易中，美元上涨了0.45个百分点。
Theft of motor vehicles is up by 15.9%.
机动车辆偷盗案上升了15.9%。
Investment is up by 5.7% after adjustment for inflation.
针对通货膨胀作出调整之后投资上升了5.7%。
Net profit was up 16.1%.
纯利润上升了16.1%。
It was up to the US to take the initiative in repairing relations.
在修复关系方面应由美国采取主动。
It was up to him to make it right, no matter how long it took.
由他负责把事情摆平，不管花多长时间。
It is up to the regulating authority to put the measures into effect.
应该由管理部门落实这些措施。
Railway lines are dangerous places and it is up to parents to ram home the dangers to their children.
铁路是危险的地方，父母有责任让孩子们清楚地认识到这一点。
It was up to him to concentrate on his studies and make something of himself.
是否能专心学习并取得一定成就要靠他自己。
He was up all night.
他通宵未眠。
Soldiers are up at seven for three hours of exercises.
士兵7点起来操练3个小时。
be up to sb 由某人负责
Prevention of forest fires is up to you.
森林防火是你们的责任。
So when it comes to decision making, the choice is up to you.
所以做决定的时候决定权在你。
I'll leave it up to you to use your discretion.
我把这件事留给你自己斟酌决定。
最后：
We're up to our ears in work.
我们工作忙得不可开交。
We're up to our eyes in work.
我们工作忙得不可开交。