until
介词 prep.
1.直到...时,到...为止
Will this fish keep until tomorrow?
这鱼能搁到明天吗?
2.(用于否定句)在...之前,直到...(才)
She didn't go to bed until eleven o'clock.
她直到十一点才上床睡觉。
连接词 conj.
1.直到...时,到...为止
He worked in Hong Kong until his father found him a job in Canada.
在他父亲给他在加拿大找到差事前,他一直在香港工作。
2.(用于否定句)在...以前,直到...才
She didn't go to bed until her daughter came back.
她一直等到女儿回来才去睡觉。
while
名词 n.
1.一会儿,一段时间[S]
I'll be back in a while.
我一会儿就回来。
连接词 conj.
1.当...的时候,和...同时
She listened closely while he read the letter.
他读信时,她听得很仔细。
I'll take care of your children while you are away.
你不在时我会照顾你的孩子的。
We must strike while the iron is hot.
我们必须趁热打铁。
2.而,然而
I like tea while she likes coffee.
我喜欢喝茶,而她喜欢喝咖啡。
3.虽然,尽管
While I like the color of the hat, I do not like its shape.
虽然我喜欢这顶帽子的颜色,但我不喜欢它的形状。
4.只要
therefore
副词 ad.
1.因此;因而;所以
He was down with the flu, and therefore couldn't come to the party.
他患了流行性感冒,因此未能前来参加宴会。
as
副词 ad.
1.跟...一样地,同样地
Sam is as rich as Alexander.
山姆像亚历山大一样富有。
2.如同;例如
Such animals as foxes and squirrels have bushy tails.
有些动物,如狐和松鼠,有蓬松的尾巴。
介词 prep.
1.作为,以...的身份
She works as an interpreter in that company.
她在该公司里担任翻译员。
2.当作
She didn't think much of him as a painter.
她对他作为一位画家评价不高。
3.像;如同
The old woman was dressed as a young lady.
这位老妇人打扮得像一位年轻人。
连接词 conj.
1.像...一样;依照;像
You ought to do as Paul tells you.
你应按照保罗吩咐的做。
The work is not so difficult as you imagine.
这工作不像你想像的那么困难。
2.当...时
As she left the room she remembered that book.
她离开房间时想起了那本书。
3.随着
As the sun rose the fog dispersed.
太阳一出来,雾随之消失。
4.因为
We didn't know what to do as we were just visiting there.
我们不知道该怎么办,因为当时我们仅仅在那里作访问。
5.虽然
Tired as he was, he sat up late.
他虽然疲倦,可仍然很晚才睡。
代词 pron.
1.(与such,the same,as等连用,引导关系从句)与...相同的事物(或人)
He has earned as much money as I have.
他赚的钱和我赚的一样多。
She felt just the same as he did.
她和他的感受相同。
There is a general rise in prices such as occurred in the late 60's.
物价普遍上涨,跟六十年代末一样。
2.(引导从句,对前述内容作补充)本情况,该事实
She has married again, as was expected.
她已再婚,这是意料中的事。
We are tired, as anyone can see.
我们累了,这是有目共睹的。
when
副词 ad.
1.(用作疑问副词)什么时候,何时
I'd like to know when they'll let him out.
我想知道他们什么时候放他。
When did you last see Margaret?
你上一次见到玛格丽特是什么时候?
2.(用作关系副词,引导关系从句)当...时
There were times when I didn't know what to do.
有些时候我不知道该怎么办才好。
连接词 conj.
1.当...时
John got engaged to her when travelling last winter.
去年冬天旅行时,约翰与她订了婚。
Don't get excited when you talk.
你说话时别激动。
2.既然,考虑到
How can he get the promotion when his boss dislikes him?
既然上司不喜欢他,那他怎么会获得提升呢?
3.虽然,然而
I had only fifteen dollars on me when the book I wanted cost twenty.
我身上只带了十五元钱,可是我想买的那本书定价二十元。
4.在那时,然后
代词 pron.
1.什么时候,那时
Since when has she taught here?
她从什么时候开始在这儿教书的?
名词 n.
1.(事件发生的)时间[the S]
ever
副词 ad.
1.(多用于疑问句、否定句和表示条件和比较的附属从句)在任何时候;从来;至今
If you ever see George, give him my kind regards.
如果你见到乔治,请代我向他致以亲切的问候。
She was happier than she had ever been.
她比以前任何时候都更高兴。
He is one of the very best men I have ever met.
他是我遇见的最好的人之一。
No such person ever existed.
这样的人从来没有存在过。
Have you ever been to London?
你到过伦敦吗?
2.永远,始终;总是
He is ever ready to help you.
他总是乐意帮助你的。
3.(用于疑问副词或代词之后,加强语气)究竟,到底
Who ever can it be?
那究竟会是谁呢?
What ever put that idea in your head?
到底是什么使你想出那个主意的?
4.【美】【口】(用于加强感叹语气)非常
Was she ever tired!
她累极了!
ever-
前缀 pref.
1.(构成形容词)表示"永远","持续"(如:ever-increasing, ever-present)
since
副词 ad. (常用于现在完成时或过去完成时)
1.此后;从那时到现在
She left school three years ago and has worked as a nurse ever since.
她三年前毕业,从那时起便一直当护士。
2.之前,以前
介词 prep.
1.(常用于现在完成时或过去完成时)自...以来,从...至今
I haven't heard from him since last year.
我自去年以来未曾收到过他的信。
连接词 conj.
1.(常用于现在完成时或过去完成时)自...以来,从...至今
It's been ten years since they married.
他们结婚到现在已经十年了。
She has been living a hard life since her husband died.
她自从丈夫死后,一直过着艰苦的生活。
2.既然;因为,由于
He must have taken the book since it isn't here.
他一定是把书拿走了,因为书已不在这里了。
Since it is so hot, let's go swimming.
既然天气这么热,我们去游泳吧。
in addition
另外
They eat a great deal of fruit in addition.
他们还吃大量的水果。
