1
[ADV 副词]已经（用already时，英国英语中动词用完成时态，美国英语有时则用一般过去时） You use
already to show that something has happened, or that something had happened before the moment you are referring to. Speakers of British English use
already with a verb in a perfect tense, putting it after 'have', 'has', or 'had', or at the end of a clause. Some speakers of American English use
already with the simple past tense of the verb instead of a perfect tense.
They had already voted for him at the first ballot...
在第一次投票选举时，他们已经投票给他了。
The group has already shed 10,000 jobs...
该集团已经裁去1万个工作岗位。
I already told you not to come over...
我已经告诉你别过来了。
They've spent nearly a billion dollars on it already.
他们已经在那上面花了近10亿美元。
2
[ADV 副词]早已（用于be动词或助动词之后，或一般动词之前，表示强调时可置于句首） You use
already to show that a situation exists at this present moment or that it exists at an earlier time than expected. You use
already after the verb 'be' or an auxiliary verb, or before a verb if there is no auxiliary. When you want add emphasis, you can put
already at the beginning of a sentence.
The authorities believe those security measures are already paying off...
当局相信那些安全措施已经奏效。
He was already rich...
他已经很富有了。
He was already late for his appointment...
他约会已经晚了。
Get 10% off our already low prices!...
把我们已经很低的价格再下调10%！
Already, he has a luxurious villa in Formello.
他已经在福尔梅洛拥有了一幢豪华别墅。
Usage Note :
Already is often used to add emphasis or to suggest that it is surprising that something has happened so soon. They were already eating their lunch. If you say that something is still happening or is still the case, you are usually emphasising your surprise that it has been happening or has been the case for so long. She was still looking at me... There are still plenty of horses round here. You use yet in negative sentences and in questions. It is often used to add emphasis, to suggest surprise that something has not happened, or to say that it will happen later. Have you seen it yet?... The troops could not yet see the shore... It isn't dark yet. In British English, already and yet are usually used with the present perfect tense. I have already started knitting baby clothes... Have they said sorry yet? In American English, a past tense is commonly used. She already told the neighbors not to come... I didn't get any sleep yet. This usage is becoming more common in British English.
already常用于强调或暗示某件事的发生快得令人惊奇：They were already eating their lunch（他们已经在吃午饭了）。still可用来强调对某件事发生或持续如此长时间感到惊奇：She was still looking at me（她还在看着我），There are still plenty of horses round here（这附近还有很多匹马）。yet常用在否定句和疑问句中表示强调，或对某事还未发生表示惊奇，或表示某事将要发生：Have you seen it yet（你看过了吗），The troops could not yet see the shore（部队还是看不见海岸），It isn't dark yet（天色还没有暗下来）。英国英语中already和yet通常用于现在完成时：I have already started knitting baby clothes(我已经开始织婴儿衣服了），Have they said sorry yet（他们道过歉了吗）。美国英语中，常用于过去时：She already told the neighbors not to come（她已经告诉邻居们别来了），I didn't get any sleep yet（我还没合过眼）。这种用法在英国英语中也越来越普遍。