1.yet用于否定句和疑问句中及用于表示怀疑的动词之后,意思是“还,尚,仍然,直至现在”,在英式英语中通常用于现在或过去完成时,在美式英语中通常用于一般过去时。
2.yet用于疑问句中,还可作“已经”“还”“仍然”解,通常放在句末。
3.yet用于肯定句中,可表示“还”“尚”,有时含有“还为时太早”之意; 与形容词或副词的比较级连用时意为“甚至,更”“还要”,与最高级连用意为“到目前〔当时〕为止(最…)”。
4.yet还可与表示未来含意的情态习语be to或have to连用构成“be yet to”或“have yet to”结构。
5.在美式英语中, yet可用在感叹句中。

as yet
到现在为止until now
As yet,I haven't met her.到现在为止,我还没遇见她。

He can't drive yet.他还不会开车。
Has Sally arrived?Not yet萨莉来了吗?还没有。
The job is not yet finished.这工作还没做完。
Have the children come home yet?孩子们已经回家了吗?
He said he hadn't received a letter from her yet.他说他至今尚未收到她的信。
The poor girl loves him yet.那可怜的姑娘现在依然爱着他。
Go at once while there is yet time.趁着还有时间,马上去。
You must work harder yet.你必须更努力些。
This is the biggest underground lake yet discovered.这是迄今为止所发现的最大地下湖。
He may surprise us all yet.他总有一天会让我们大家感到惊奇的。
The most severe weather is yet to come.最冷的天气还在后头呢。
I have yet to find out the truth.我还得去了解真相。
Ah, so you've bought new slippers yet!啊,所以你还买了新拖鞋!

yet, already
参见already条。
yet, still
参见still条。

1.yet用作连词的意思是“然而,但是”,往往含有“尽管如此,但…”之意,连接意思相反的分句。
2.yet可与and, but, although或though连用。

She's a funny girl, yet you can't help liking her.她很滑稽,但你禁不住会喜欢她。
The boy is so fat and yet he runs very fast.这男孩很胖,但却跑得很快。
Although he is very old, yet he is quite strong.他虽然年纪很大了,但还很强壮。
I agree with you, but yet I can't consent.我同意你的意见,但是我不能答应。
Though he lives alone, yet he is happy.他虽然独自生活,但却很愉快。

［词源］＜古英语geta(还,仍然)