介词:介词是一种用来表示词与词、词与句之间的关系的虚词，在句中不能单独作句子成分。介词后面一般有名词代词或相当于名词的其他词类，短语或从句作它的宾语。介词和它的宾语构成介词词组，在句中作状语，表语，补语或介词宾语。介词可以分为时间介词、地点介词、方式介词、原因介词和其他介词。
of的用法
介词 prep. （表示所有，要占有）…的
word that shows what you have and own
· A prince is the son of a king.
王子是国王的儿子。
· It's the custom of the country.
这是这个国家的习惯。
· Beijing is the capital of China.
北京是中国的首都。
介词 prep. 从，在其中
out of,from among
· A cow is a kind of animal.
牛是动物的一种。
· He is one of my best friends.
他是我的最好的朋友之一。
介词 prep. 包含有；有
containing,having
· Pass me a glass of milk.
递给我一杯牛奶。
· He lives in a house of three rooms.
他住在一所有三个房间的房子里。
· He is the most dangerous of enemies.
他是仇敌中最凶恶的。
介词 prep. 由…制成
made from
· The bridge is made of stone.
这座桥是用石头造的。
· The book consists of several chapters.
这本书有好几章。
· What is the desk made of?
桌子是用什么做的？
介词 prep. 关于
about,concerning
· I have heard of the news.
我听说过这个消息。
· It was he who told me the news of the victory.
是他告诉我这胜利的消息。
介词 prep. 叫做；系…
which is (called)
· The city of Harbin is a big city.
哈尔滨市是一个大城市。
介词 prep. 从；来自
from
· He is a man of humble origin.
他是一个出身微贱的人。
· He was born of a good family.
他生于一个好家庭。
介词 prep. 表示地点
word that shows place
· He lives at the end of the road.
他住在马路的尽头。
· The village lies within a mile of the town.
这村子离城镇不到一英里。
介词 prep. 表示和别人的关系
word that shows what you are to another person
· He is beloved of all.
他受到大家的爱戴。
介词 prep. 表示解除，剥夺，免除
indicating relief,deprivation,riddance
· I was robbed of my watch.
我手表被抢了。
· The doctor cured the sick man of his disease.
这医生治好了这病人的疾病。
介词 prep. 表示原因
indicating cause
· We are proud of our motherland.
我们为我们的祖国而骄傲。
· You ought to be ashamed of yourself.
你应为你自己感到羞耻。
介词 prep. 表示区分，包含，分量
indicating partition,inclusion, measure
· Yesterday I bought a ton of coal.
昨天我买了一吨煤
· the adoption of Western technique
采用西方技术
off的用法
介词 prep. 从…下来；离开…不在…之上
down from,away from,not on
· The chalk fell off the desk and broke.
粉笔从书桌上掉下来摔断了。
· Cut a piece of bread off the loaf.
从面包上切一块下来。
· Keep off the grass.
勿踏草地。
· I can't get this ring off my finger.
这个戒指我摘不下来。
介词 prep. 在…附近；靠近
near
· The house stands just off the main street.
房子在大街旁边不远。
· Our boat anchored off the French coast.
咱们的船停泊在离法国海岸不远的海面。
介词 prep. 不当班；不值勤
free from
· He is off duty.
他下班了。
· A policeman does not wear a uniform when he is off duty.
警察不值勤时不穿制服。
介词 prep. 不想；不喜欢
not wanting,not liking
· I'm off my food.
我不爱吃饭。
介词 prep. 连着
joining
· It is a track off the main road.
这是一条连着大路的小道。
副词 adv. 脱开；去掉
not on,away from the place where it was
· You had better leave your coat off.It's too heavy for such warm weather.
你最好还是别穿外套了，天这么暖和，穿这种衣服太厚了。
副词 adv. 关上；断绝
not on,out so that it is not working
· The room is bright enough now,please turn the light off.
屋里现在够亮了，请把灯关掉。
· We must use candles because the electricity is off.
我们必须用蜡烛，因为停电了。
副词 adv. 离；距
away
· The park is five miles off.
公园在五英里路以外。
副词 adv. 离开
away to another place
· They're off!
他们动身了！
· He went off to bed without saying anything.
他什么也没说就去睡觉了。
副词 adv. 分开；不在一起
apart.not joined
· The cup's handle broke off.
茶杯的把掉了。
· One of the wheels flew off.
一只轮子飞了。
副词 adv. 在远处
away
· We can walk to the station because it is not far off.
我们可以走到火车站，因为离这里不远。
副词 adv. 不新鲜
not fresh
· This meat is going off.
这肉不新鲜了。
副词 adv. 不工作
not at work
· The cook is having a day off today.
厨师今天休息。
· Can I have the day off tomorrow?
明天我可以请假吗？
形容词 adj. 更远的
more distant,farther
· He went round to the off side of the wall.
他绕到墙的后面去了。
形容词 adj. 不好的；不到水准的
not very good, not up to average
· It is an off season for fruit.
这是水果淡季。
形容词 adj. 不舒服的
not fit or well
· I am feeling rather off today.
我今天很不舒服。
for的用法：
介词 prep. （表示时间、距离）计，达
word that shows how far or how long
· I have waited for three hours.
我等了三小时。
· For much of the time he suffered from bad health.
在很长时间里，他身体都不好。
· They were silent for a while.
他们沉默了一会儿。
· It's time for little girls to be in bed.
小女孩就寝的时间到了。
· We walked(for) a mile and ran (for) a mile.
我们走了一英里，又跑了一英里。
介词 prep. 开往，向
word that shows where someone or something is going
· She left Tianjin for Beijing.
他离开天津上北京去了。
· Is this the train for Glasgow?
这是开往格拉斯哥的火车吗？
介词 prep. 给，与，适于
word that shows who will get or have something
· This is a present for you.
这是给你的礼物。
介词 prep. 当作
as; as being
· I took him for his brother.
我把他当作是他的兄弟。
介词 prep. 因为，由于
by reason of, on account of; because of
· We could not see for the fog.
因为有雾，我们看不见。
· They did not draw the conclusion for the following reason.
由于下述理由他们没有作出结论。
· He was punished for stealing.
他因偷窃而受惩处。
介词 prep. 就…而言
word that shows whom you are talking about
· It is dangerous for a small child to cross the road alone.
小孩子自己过马路危险。
· It's for you to decide.
这件事由你来决定。
· He is tall for his age.
他小小年纪，个子倒挺高。（就他的年纪来说，他的个子算是高的。）
介词 prep. 为了，供
word that shows why you are doing something
· It is very cold for October.
十月里这样的天气真是很冷。
· I have got some picture books for you to look at.
我有一些让你看的书。
· No house was big enough for him to live in.
没有那么大的房子可供他住。
· We work hard for socialism.
我们为社会主义努力工作。
介词 prep. （比赛或战斗时）代表，代，替
on the same side in a sport or fight
· They would run for the United States.
他们将代表美国去参加赛跑。
· Tim plays tennis for his school.
蒂姆代表学校参加网球赛。
介词 prep. 价格，交换
word that shows how much something is
· I want to change this for that.
我想用这个换那个。
· I paid two dollars for the book.
为这本书我付了两元钱。
· I gave 5 pounds for it.
我出五英镑买的。
介词 prep. 赞成，支持
word that shows you like an idea
· Are you for or against the proposal?
你是赞成这个建议还是反对这个建议？
· Some people were for the strike and others were against it.
有些人赞成罢工，另一些人反对。
连词 conj. 因为
because; on account of the fact that
· I am thirsty, for the sun is hot.
我由于天热而口渴。
· I missed the beginning of the play,for I was late.
我没有看到话剧的开头部分，因为我迟到了。
to的用法：
介词 prep. 到；向；往
word that shows where someone or something is going,etc.
· We walked to town.
我们走路进城。
· He leads us from victory to victory.
他领导我们从胜利走向胜利。
· Point to the blackboard.
指着黑板。
· That road leads to Beijing.
那条路通向北京。
· The peach is rotten to the core.
这个桃子烂到核里了。
介词 prep. （表示接受者）给
word that shows who is receiving something
· Please give the book to me.
请把书给我。
· I gave the candy to Mary.
我把糖果给了玛丽。
介词 prep. （表示几点差几分）到；缺
word that shows how many minutes before the hour
· It's ten minutes to six.
六点差十分。
· They fought to the last.
他们战斗到底。
介词 prep. 远至；直到
as far as; until
· I shall stay to the end of June.
我会一直待到六月底。
· She read the book from the beginning to the end.
这本书她从头到尾全都看了。
介词 prep. （表示地点）在；到
word that shows where
· He tied the donkey to the tree.
他把驴拴在树上。
· Fasten it to the wall.
将它系到墙上。
介词 prep. （表示原因）为
word that shows why
· He came to help me.
他帮我的忙来了。
介词 prep. （表示变化）成为
word that shows a change
· He was brought to poverty.
他变穷了。
· The sky changed from blue to grey.
天空由蓝变灰。
介词 prep. 表示发展到的地步
(expressing some point reached or extent)
· He is an Englishman to core.
他是彻头彻尾标准的英国人。
· I got wet to the skin.
我全湿透了。
介词 prep. 表示比较、相比
(expressing comparison) compared with�
· He is quite rich to what he once was.
比起从前，他现在是富裕多了。
介词 prep. 表示加上、附合、配合
expressing addition or accompaniment with
· Add three to five.
五加上三。
· We danced to the music.
我们配合着音乐跳舞。�
介词 prep. 表示结果或事情引发的情状
expressing a result or a resulting condition
· He tore it to pieces.
他把它撕成一片片。
· The train slowed to a stop.
火车缓速而后停下来。�
介词 prep. 构成动词不定式 用作名词；用作形容词；用作副词；其他用法
(used as a sign of the infinitive) a) noun use; b) adjectival use ;c) adverbial use;d) other uses
· a)It is wrong to tell a lie.
说谎是不对的。
· b)I have something to eat.
我有些吃的东西。
· water to drink
可饮用的水
· a house to let
出租的房子
· c)We eat to live.
我们吃是为了活下去。
· I am glad to see you.
见到你很高兴。
· d)To tell the truth, he is a good student.
说实话，他是一个好学生。
· He is to come at three o'clock.
他三点钟要来。
· He seems to be happy.
她看来似乎快乐。
· They learned how to write letters in English.
他们学习了怎样写英文信。
副词 adv. 来回地
to and fro, backwards and forwards
· She swung to and fro on the swing.
她在秋千上摆来摆去。
on+日/特指的早中晚，其他用in，节日
in+年/月，in+一段时间用how soon提问
at用于会议/准确时间
参考资料：北京四中网校，自己