yet，already，still区别及用法是什么？

still,yet和already的用法

1.already

already表示“已经”,常用于肯定句中.例如：

It's only 11 o'clock and they have already had lunch. 现在才11点,他们已经吃过午饭了.

Are they building a new hotel here? There are too many hotels already. 他们要在这儿建一个新饭店吗?这儿的饭店已经够多了.

[注] already偶尔也可用于疑问句,此时具有“惊奇”的意味.例如：

Have you finished the work already? You are very speedy.

你已经完成工作了吗?你的速度真快.

[例题] The moon , everybody .

[答案] B.already改为yet.

2.still

still强调过去发生的事情及存在的状况目前还在延续.在现在完成时的否定句中,still表

示吃惊或不耐烦的语气;但在现在进行时中,still只表示动作正在持续,不带有感情色彩.例如：

My neighbour hit my car last week and he still hasn't apologised. 我的邻居上周撞了我的车,可他到现在还没有道歉呢.

He's still living with his mother. 他仍与母亲住在一起.

3.yet

yet常用于疑问句和否定句.在疑问句中,用来询问说话人期望发生的事情是否已经发生.在否定句中,表示说话人期望发生的事情尚未发生.例如：

John, have you finished that report yet? 约翰,你把报告已经写出来了吗?

John hasn't finished that report yet and I asked him for it three days ago. 约翰还没有写完报告,可我三天前就要他交了.

　　already的用法如下：?

already的意思是“较早地”“提前”,可表示“比预想发生的时间早”,也可表示“比可能发生的时间早”,含有“想不到某事竟然已经发生了”或“以为某事会晚一些发生”的意味。

already一般用于肯定句中。与动词搭配时,静态动词多用一般式,动态动词多用完成式。表示与现在时间相比而已经做过的事,即by this time,须用现在完成时; 表示与过去时间相比而已经做过的事,即by that time,用过去完成时或过去进行时。already不用于一般将来时。

already偶尔也可用于疑问式,或者表示惊讶、怀疑,或者表示期望〔预计〕有一个肯定的回答。

already在句中一般位于主要动词前面,系动词或助动词后面。为了强调,可置于句末、句首或助动词之前。

already不用于比较等级。

already有时也用于祈使句,能使语气严肃的祈使句在语气上变得缓和,常用于口语中。例如：Let's start already.那么咱们动身吧!Shut up already.别说了,好不好!

already英语例句：?

1. He was already asleep in the bed, which smelled faintly of mildew.

他已经在略带霉味的床上睡着了。

2. The material consisted only of already published, unclassified information.

这份材料里只有一些已公开的、非保密性质的信息。

3. The country's politicians are already heaving a collective sigh of relief.

该国的政界人士均已松了口气。

4. The scientists have already experimented at each other's test sites.

科学家已经在彼此的实验场所进行了实验。

5. He is already getting in trim for the big day.

他已经在为那个重要的日子调整状态了。

6. Already, both sides are jockeying to belittle the other side.

双方已经在使出浑身解数贬低对方了。

7. Two out of every three Britons already own a video recorder.

每3个英国人中就有两个已经有了录像机。

8. Food production has already fallen behind the population growth.

粮食生产已经跟不上人口增长。

9. The American edition of "Cloud Street" is already in its third printing.

美国版的《云街》已经是第三次印刷了。

10. The caterers were already laying out the tables for lunch.

负责餐饮的人已经在为午餐摆桌了。

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