1. We have studied English for years.
   我們學(xué)英語(yǔ)已有好幾年了。
2. They jumped for joy.
   他們高興地跳了起來(lái)。
3. Jim is going to get material for a new book.
   吉姆正打算為一部新書(shū)準(zhǔn)備材料。
4. It is for her own good.
   這是為了對(duì)她自己有好處。
5. He has a great respect for his father.
   他很敬佩他的父親。
6. What can I do for you?
   要我?guī)兔幔?/div>
7. Are you for or against?
   你是贊成還是反對(duì)？
8. He shook his head, for he thought differently.
   他搖搖頭，因?yàn)樗南敕ㄅc此不同。

for

prep.（介詞）

Used to indicate the object, aim, or purpose of an action or activity:
為了：用來(lái)指一個(gè)動(dòng)作或活動(dòng)的目的、目標(biāo)或意圖：
例句：
trained for the ministry; put the house up for sale; plans to run for senator.
為政府部門(mén)培訓(xùn)；把房子拍賣(mài)；計(jì)劃競(jìng)選議員

Used to indicate a destination:
往，向：用來(lái)指目的地：
例句：
headed off for town.
出發(fā)去城里

Used to indicate the object of a desire, an intention, or a perception:
對(duì)于：用來(lái)指愿望、意圖或感覺(jué)的目標(biāo)：
例句：
had a nose for news; eager for fame and fortune.
消息靈通；渴求名利

Used to indicate the recipient or beneficiary of an action:
為：用來(lái)指一個(gè)活動(dòng)的接受者或受益者：
例句：
prepared lunch for us.
為我們準(zhǔn)備午餐

On behalf of:
代表：
例句：
spoke for all the members.
代表全體成員發(fā)言

In favor of:
對(duì)…支持：
例句：
Were they for or against the proposalô
他們支持這項(xiàng)議案還是反對(duì)呢ô

In place of:
代替…：
例句：
a substitute for eggs.
雞蛋的替代品

Used to indicate equivalence or equality:
等值，等量：用于表示等值或相同關(guān)系：
例句：
paid ten dollars for a ticket; repeated the conversation word for word.
花十美元買(mǎi)了張票；逐字逐句地重復(fù)談話(huà)

Used to indicate correlation or correspondence:
用于表示關(guān)聯(lián)或聯(lián)系：
例句：
took two steps back for every step forward.
每前進(jìn)一步向后退兩步

Used to indicate amount, extent, or duration:
達(dá)：用于表示數(shù)量、范圍或持續(xù)時(shí)間：
例句：
a bill for five dollars; walked for miles; stood in line for several minutes.
五美元的鈔票；步行了數(shù)英里；排了幾分鐘的隊(duì)

Used to indicate a specific time:
在：用于表示一個(gè)具體時(shí)間：
例句：
had an appointment for two o`clock.
兩點(diǎn)鐘有一個(gè)約會(huì)

As being:
當(dāng)作：
例句：
take for granted; mistook me for the librarian.
視為當(dāng)然；把我誤認(rèn)為是圖書(shū)管理員

Used to indicate an actual or implied listing or choosing:
針對(duì)…：用于表示實(shí)際的或隱含的列舉或選擇：
例句：
For one thing, we can`t afford it.
第一，我們買(mǎi)不起

As a result of; because of:
由于；因?yàn)椋?/br>例句：
jumped for joy.
因高興而跳起來(lái)

Used to indicate appropriateness or suitability:
用于表示適度或適當(dāng)：
例句：
It will be for the judge to decide.
這要由法官來(lái)決定

Notwithstanding; despite:
雖然；盡管：
例句：
For all the problems, it was a valuable experience.
盡管還存在許多問(wèn)題，這仍不失為一次寶貴的經(jīng)驗(yàn)

As regards; concerning:
關(guān)于；至于：
例句：
a stickler for neatness.
有潔癖的人

Considering the nature or usual character of:
至于：關(guān)于…的性質(zhì)或一般特征：
例句：
was spry for his advanced age.
就他的高齡來(lái)說(shuō)，他應(yīng)該算是充滿(mǎn)生氣的了

In honor of:
為紀(jì)念…：
例句：
named for her grandmother.
為紀(jì)念她的祖母起的名字

conj.（連接詞）
Because; since.
因?yàn)?；既?/br>
來(lái)源：
Middle English
中古英語(yǔ)
from Old English * see per
源自 古英語(yǔ) *參見(jiàn) per