already / yet 意为“已经”

1. already 常同完成时连用，大多用于肯定句，有时用于疑问句，表示意外、惊讶。

2. yet 用于否定句或疑问句中，谈论尚未发生但可能发生的事情。

全部

1·No decision has yet been made.

尚未作出决定。《柯林斯英汉双解大词典》

2·Hasn't the baby gone off yet?

孩子还没睡着吗？《牛津词典》

3·I'm not finished with you yet.

你我之间的交道还没有完。《牛津词典》

4·The news is not yet official.

这消息尚未经官方证实。《牛津词典》

5·You ain't seen nothing yet.

你什么都还没有看到。《牛津词典》

6·I haven't packed my suitcase yet.

我的行李箱还没收拾好呢。《牛津词典》

7·They haven't finished yet.

他们还没有结束。《柯林斯英汉双解大词典》

8·I saw yet another doctor.

我还看了另一位医生。《柯林斯英汉双解大词典》

9·Haven't you twigged yet?

难道你还不明白？《牛津词典》

10·Billy can't count yet.

比利还不会数数。《牛津词典》

还

1·I haven't packed my suitcase yet.

我的行李箱还没收拾好呢。《牛津词典》

2·Alex is not interested in girls yet.

亚历克斯对女孩子还不感兴趣。《牛津词典》

3·I can't give you the money just yet.

我这会儿还不能给你钱。《牛津词典》

4·They haven't finished yet.

他们还没有结束。《柯林斯英汉双解大词典》

5·You ain't seen nothing yet.

你什么都还没有看到。《牛津词典》

但

1·The mirror is functional yet decorative.

这镜子能照人，但也有装饰作用。《牛津词典》

2·His voice was soft, yet laden with threat.

他说话的声音很柔和，但充满了恐吓的语气。《牛津词典》

3·The soup was thin and clear, yet mysteriously rich.

那汤既稀又清，但味道却出奇地足。《柯林斯英汉双解大词典》

4·I struck the glass with my fist with all my might; yet it remained whole.

我使尽全力用拳头砸那块玻璃，但它却完好无损。《柯林斯英汉双解大词典》

5·He did not witness her execution, yet he and the others are complicit in her death.

他虽然没有目睹她的死刑执行，但对于她的死，他和其他人都难脱干系。《柯林斯英汉双解大词典》

然而

1·I don't eat much, yet I am a size 16.

我吃得不多，然而我是个穿16号的人。《柯林斯英汉双解大词典》

2·He has a good job, and yet he never seems to have any money.

他有份好工作，然而他却好像总也没有钱。《牛津词典》

3·His books are enormously easy to read, yet he is a serious artist.

他的书极易读，然而他却是一位严肃的文学艺术家。《柯林斯英汉双解大词典》

4·It was an historic day, yet its passing was not marked by the slightest excitement.

这是有历史意义的一天，然而这一天的结束却没有被赋予丝毫的兴奋感。《柯林斯英汉双解大词典》

5·You can get married at sixteen, and yet you haven't got a say in the running of the country.

你可以在16岁结婚，然而对国家的管理你还没有发言权。《柯林斯英汉双解大词典》

但是

1·This is a smart, yet soft and feminine look.

这是一张透着精明的面孔，但是线条柔和、女性味十足。《柯林斯英汉双解大词典》

2·The food is edible, yet often unsalable because of incorrect labeling or damaged packaging.

这种食品能吃，但是通常因为错误的标签或损坏的包装而卖不出去。《柯林斯英汉双解大词典》

3·Elgar received many honours and much acclaim and yet he often considered himself a failure.

埃尔加获得了很多荣誉和欢呼，但是他常常把自己看成一个失败者。《柯林斯英汉双解大词典》

4·Though Jupiter is not able to draw the earth out of its course round the sun, yet it attracts the earth to some extent.

虽然木星不能够把地球从围绕太阳旋转的轨道上拉出来，但是它对地球的引力也产生了相当大的作用。

5·In Africa, women till the land and produce the bulk of the food, yet they have no understanding about marketing, Sadza said.

“在非洲，妇女种地并生产大部分的粮食，但是她们不懂营销。”Sadza 说。

却

1·It is a complex yet stimulating book.

这是一本复杂却能引发兴趣的书。《柯林斯英汉双解大词典》

2·He was full of sympathy for her, yet he didn't know what to say.

他很同情她，却又不知说什么好。

3·I thought I had separated you from all the world, and yet you have deceived me!

我以为你已经与世隔绝了，你却欺骗了我！

4·The language is almost intoxicating, an aging writer looking back on an ambitious yet simpler time.

语言几乎让人沉醉，一个年迈的作家在回顾一个雄心勃勃却又简单的时代。

5·I noticed the way his hindquarters shifted over to the right, never in line with the front, yet always in perfect rhythm.

我注意到他后肢向右偏的方式，从不与前肢在一条线上，却始终有理想的节奏。

可是

1·She hasn't had much success yet. Mark you, she tries hard.

她还没取得什么成功，可是她非常努力。《牛津词典》

2·They were so afraid of me, and yet they were so excessively fond of me.

他们那么怕我，可是他们又那么喜欢我。

3·Both were cruelly tired, yet Becky said she thought she could go a little farther.

两人都累得够呛，可是贝基说她还可以再走远一点。

4·You have done all this! And yet you can treat the mention of his misfortunes with contempt and ridicule.

这些事都是你做的，可是人家一提到他的不幸，你还要鄙视和嘲笑。

5·Yet as a lad people had said of him that he was one who might do anything if he tried.

可是当他还是一个少年的时候，人们就说过，他是那种想做什么就能把什么做好的人。

仍

1·Like the best stories, this one may yet have a happy ending.

像那些最好的故事一样，这个故事可能仍有个幸福的结局。《柯林斯英汉双解大词典》

2·They may yet be his epitaph.

它们可能仍是他的墓志铭。

3·The serum glycocholic acid was yet higher than normal.

血清甘胆酸仍高于正常水平。

4·Although the technology exists, different approaches do not as yet work well together.

尽管这种技术存在，不同的方法仍不能很好的协调工作。

5·The US can expect to be the sole superpower for some time yet, if we mean by the term a state capable of deploying effective power almost anywhere in the world.

美国仍可以指望在一段时间内作为唯一的超级强权，如果我们衡量的条件是一个国家是否能在几乎全世界各地都部署有效力量。

尚

1·As yet it is not known whether the crash was the result of an accident.

迄今尚不知该撞击是否是由于一起事故。《柯林斯英汉双解大词典》

2·The plan of reconstruction has not taken on the shape yet.

改建计划尚不成形。《新英汉大辞典》

3·There are no users in the database repository yet.

在数据库存储库中尚没有任何用户。

4·It has yet to explain how costs can be kept so low.

至于为何可以保持如此低廉的价格还尚待解释。

5·This method does not yet exist because you need to create it.

此方法尚不存在，因为您需要创建此方法。

仍未

1·A series of dikes and makeshift barricades designed to protect Bangkok from the full brunt of the floods appeared to be holding over the weekend, but experts warned the city isn't out of danger yet.

为保护曼谷免受洪水猛烈冲击而建设的一系列堤坝和临时障碍物似乎暂时是挺过来了，但专家警告，曼谷仍未脱离危险。

2·However, speaking at ICHEP, Dr Robert Johnson said team members had found no evidence as yet for these events.

无论如何，罗伯特·约翰逊博士在巴黎高能物理会议上称实验小组成员仍未找到这些(物理)事件发生的证据。

3·I am now in my 50s. I still travel a lot and I've seen yet more of the world's mounting population and some of its remaining wildlands.

我现在50多岁了，仍旧经常旅行，我已经见过这个人口不断增长的世界中的许多人和世界上一些仍未开发的荒野之地。

4·People with prediabetes have glucose levels that are higher than normal but not high enough yet to indicate diabetes.

前驱糖尿病患者是指那些血糖虽高于正常值却仍未达到糖尿病诊断标准的人们。

5·The Japanese real estate market has yet to fully recover from its 1980s excesses.

日本的房地产市场至今仍未从上世纪80年代的过度膨胀中完全地恢复过来。

(1)and yet可是，然而

(1)as yet至今仍

(1)nor yet也没有，也不