一. allow用法,表示同意，许可，日常普通用词。
1.allow+名词、代词、动名词
The crowd parted to allow her through .
人群向两旁闪开让她通过。
The judge allowed my claim.
法官同意我的要求。
The school will only allow this in special circumstances.
学校只有在特殊情况下才会同意这种事。
Sorry, we don't allow dogs in the house.
对不起，我们是不让狗进家的。
She is allowed one item of hand luggage.
允许她携带一件手提行李。
We cannot allow such conduct.我们不允许有这种行为。
She refused to allow the exhibition of her husband's work.
她拒不允许展出她丈夫的作品。
They do not allow smoking.
他们不允许吸烟。
We do not allow smoking in the hall.
我们不准有人在大厅内吸烟。
2. allow someone to do something准许（促使）某人做某事
其被动式：someone be allowed to do something
My father does not allow me to smoke.
我父亲不许我抽烟。
Allow me to buy you a drink at the bar.
让我来请你喝一杯。
Allow me to introduce Dr Amberg.
请允许我介绍安伯格博士。
The compromise will allow him to continue his free market reforms.
妥协将使他得以继续他的自由市场改革。
He won't allow himself to fail.
他不会任由自己失败的。
He allowed his mind to wander.
他听任自己的思绪信马由缰。
She won't allow herself to be dictated to.
她不会听人摆布的。
He never allowed his work to impinge on his private life.
他从不让他的工作妨碍私生活。
Role-play allows students to practise language in a safe situation.
角色扮演可以使学生练习语言，说错了也没关系。
He was allowed to enter the room.
他被允许进入房间。
Private interest was not allowed to predominate over the public good.
私人利益不得置于公众利益之上。
The children are not allowed to watch violent TV programmes.
儿童不准收看含暴力内容的电视节目。
He wouldn't allow emotions to get in the way of him doing his job.
他不会让情绪妨碍自己的工作。
The course allows students to progress at their own speed.
本课程允许学生按各自的速度学习。
The doctor may allow her to return to work next week.
医生也许会允许她下周回去上班。
They shouldn't be allowed to get away with it.
不应就此放过他们。
Allow plenty of time to get to the airport.
留出足够的时间到达机场。
Allow sufficient time to get there.
留出充足的时间好赶过去。
I'm anxious that we should allow plenty of time.
我殷切希望我们能留出充裕的时间。
You're allowed an hour to complete the test.
你们有一个小时的时间来完成这次测验。
His parents won't allow him to stay out late.
他的父母不会允许他在外待得很晚。
I'm not normally allowed to stay out late.
通常情况下，我不能在外很晚不归。
He is not allowed to stay out late.
他不可以在外待到很晚。
Pride would not allow him to accept the money.
自尊心不容他接受这笔钱。
We will never allow that to happen! No sir!
我们决不能允许那样的事情发生！决不能！
3.allow of 给……（留有）余地；给……机会
The facts allow of only one explanation.
这些事实只可能有一种解释。
These facts allow of many possible interpretation .这些事实允许有多种解释。
The situation does not allow of any delay .形势不允许有任何拖延。
Situations allow of no excuse .形势不容许拖延；形势刻不容缓。
The regulations do not allow of any variation .这些规定不容许任何变动。
Such mistakes allow of no excuse .这样的错误是不能容许的。
You allow of no exceptions ?你就不容许有例外情况？
His weakened condition would not allow of his being sent to town .他身体虚弱，不容许把他送进城去。
The task is so urgent that it allow of no hesitation .任务非常紧迫，不容迟疑。
4.allow for考虑到，体谅；估计到；把…计算在内
Don’t forget to allow for traffic delays. 不要忘记把在路上交通耽误的时间考虑在内。
All these factors must be allowed for.
所有这些因素都必须估计进去。
It will take about an hour to get there, allowing for traffic delays.
考虑到交通阻塞，到那里大约需要一小时。
Please allow 28 days for delivery...
请留出28天的送货时间。
An hour and a half is allowed for the exam.
考试时间为一个半小时。
One and a half hours are allowed for the exam.
考试时间为一个半小时。
She bought a slightly larger size to allow for shrinkage.
她买了一件尺码稍大的以备缩水。
二.permit与allow基本含义相同，基本句型也相同
allow/permit sth或doing sth
allow/permit sb to do sth
但是它们的语体色彩和附加意义色彩不同，allow是个普通常用词，通常含有听任、默许的意思；permit相当正式的书面语体词，含正式批准和正式许可的意思。尤指根据正式决定、规章或法律允许某事发生或某人做某事，可后接双宾语，语义最强。请看：
The nurse allowed the visitors to remain beyond the hospital visiting hours though it was not permitted.
护士允许探视者在医院探视时间之外停留，尽管这是禁止的。
They didn't permit me to speak a word.
他们不准我讲一句话。
Who permitted their leaving early?
是谁允许他们提早离开的?
The doorman permitted them entry to the film.
门卫允许他们进去观看电影。
The use of cellular phones is not permitted on most aircraft.
大多数飞机上不许使用手机。
We were not permitted any contact with each other.
我们不许彼此有任何接触。
Radios are not permitted in the library.
图书馆内不许使用收音机。
Permit me to offer you some advice.
请允许我向你提些建议。
Permit me to give you some advice.
请允许我给你提点建议。（非常正式场合用语）
It's unbelievable that they have permitted this trial to go ahead.
令人震惊的是他们竟允许进行这项审讯。
The teacher doesn’t permit smoking in class.
老师不允许有人在课堂上吸烟。
You are not permitted to smoke in the hospital/class.
医院里不准许吸烟。/课堂上不准许吸烟。
Visitors are not permitted to take photographs.
参观者请勿拍照。
At present children under 14 are not permitted in bars.
目前，14岁以下儿童不允许进酒吧。
Employees are permitted to use the golf course during their free hours
准许雇员在业余时间使用高尔夫球场。
Since deregulation, banks are permitted to set their own interest rates.
管制撤销之后，银行可以自行设定利率。