keep off . prevent from coming near使不接近
Mary tends to keep off from people who try to be friendly too suddenly．玛丽一般不去接近那些突然变得亲热起来的人。
keep off . remain at a distance 勿走近；站在远处
The police told the boys to keep off the grass．警察告诉孩子们勿踏草地。
Keep off！Keep off！The train is moving．闪开！闪开！火车开动了。
Keep your hands off！勿用手摸！
keep off . （rain，snow，）not begin；be delayed（雨、雪等）不下；推迟
Will the rain keep off until the game? 雨会比赛以后才下吗?
I hope the rain will keep off half an hour or so，for I've forgotten to bring an umbrella．我希望这场雨等半个小时左右再下，因为我忘记带伞了。
keep off . hinder from approach or attack 阻止；驱散
Smoke will keep off mosquitoes．烟雾可驱散蚊子。
The explorers made a camp fire to keep off wild animals．探险队员们燃起篝火，使野兽不敢走近。
keep off . not eat or drink；refrain from 不吃；不喝；戒
The only way to get your weight down is to keep off fattening foods，and cut out alcohol altogether．减轻体重的唯一办法，就是不吃会使人发胖的食物，并彻底戒酒。
You'd better try to keep off strong spirits．你最好不喝烈性酒。
keep off . not mention；avoid不提；避开（话题）
You'd better keep off the religious issues and talk about something else．你最好回避宗教问题，讲讲别的内容。
keep on . continue 继续
He kept on talking all the time．他一直说个不停。
I wish you wouldn't keep on about the coat you want to buy．我希望你不要再唠叨那件你想买的外套了。
The neighbors asked them to stop making noise，but they kept right on．邻居们请他们不要闹了，但是他们仍旧在闹。
Keep on till you get to the post office and then turn right．一直往前走，到了邮局再往右拐。
keep on . allow to continue working；continue to employ继续雇用
The men were kept on by the firm at the insistence of the Union．由于工会的坚决要求，公司继续雇用了那批工人。
The new owner kept Fred on as gardener．新业主继续雇用弗莱德做园丁。
keep on . continue to wear继续穿着
I've told you before not to keep your socks on if they get wet．以前我告诉过你，如果袜子湿了，就不要再穿了。
He keeps his hat on even if he is at home．他即使在家也是一直戴着帽子。
keep one's distance . be cool toward somebody ；avoid being friendly 对某人表示冷淡；不与某人亲近
Mary did not like her coworker，Betty，and kept her distance from her．玛丽不喜欢她的同事贝蒂，因而对她很冷淡。
keep one's eyes on . observe closely；watch注视；提防
Keep your eyes on your book！眼睛看着书！
The police have been keeping an eye on the thief ever since he came out of prison．自那小偷出狱后，警察就一直注意着他。
He has been keeping his eyes on the developments in house prices．他一直关注着房价的动态。
keep one's eyes open . be watchful注视
Any businessman has to keep his eyes open for a chance of making a profit．任何一个商人都得关注谋利的机会。
He keeps his eyes open and knows the situation clearly．他高度警觉，清楚地了解自己的处境。
keep one's head . keep calm during some emergency （在紧急情况下）保持镇静
That housewife kept her head and telephoned the fire department immediately；otherwise the whole house might burn down．那个家庭主妇头脑冷静，并且立即给消防队打电话，否则整个房子就会烧光了。
Above all，keep your head in the face of danger．最主要的是，面临危险要镇静。
When Jim heard the fire alarm he kept his head and looked for the nearest exit．当吉姆听到火警铃声时，他保持镇定，寻找最近的出口。
keep one's mind on . continue paying attention to继续留神；继续专心于
It is hard to keep your mind on your work with all this noise going on．这些噪声响个不停，很难使你专心工作。
You ought to keep your mind on what you are doing．你应当专心致志地做你的工作。
keep one's mouth shut . be or stay silent 闭嘴
This is a cut throat business；keep your mouth shut．这是性命相关的大事，不可乱说。
keep one's temper . retain self-command and an unruffled spirit 从容不迫；泰然自若；忍住怒气
To keep one's temper is not a sign of weakness，but an indication of self-possession and strength．不发脾气并非表示软弱，而是说明自制和坚强。
He was insulted，but he managed to keep his temper．他受了侮辱，但他设法忍住了怒气。
I was so annoyed with him that I found it difficult to keep my temper．我对他非常气愤，很难不发脾气。
keep one's word . fulfil one's promise 守约；遵守诺言
She is a girl who keeps her word．她是一个守信的女孩。
You may depend upon what he says，for he is a person who always keeps his word．你可以相信他的话，因为他是一个遵守诺言的人。
You must keep your word even if you should lose by it ．即使守信用会吃亏，你也必须遵守信用。
Bill kept his word and arrived exactly at the time he had promised．比尔很守诺言，在他所约定的时刻准时到达。
keep open house . entertain freely 十分好客；所有来客都热情招待
Mr．Wang is very hospitable；he keeps open house for his friends and fellow workers．王先生十分好客，无论是他的朋友还是同事，他都热情接待。