(1)允(准)许(give permission to or for;let do or happen)[C+n+to-inf，T+n尤pass，T+-ing]：(not)～sb to take the wheel/talk in class/be absent (不)允许某人开车/在课上说话/缺席;The teacher won't～cheating to go unpunished.老师不会让作弊现象不受到惩罚的。Only members of the staff are～ed to use this staircase.只有工作人员才允许使用这部楼梯。We cannot～such conduct/such a thing.我们不准许这种行为/这种事情。Photography is not～ed here.此处不准拍摄。They do not～smoking in class/parking in this street.课上不许抽烟/这条街不许停车。No smoking/dancing～ed.禁止吸烟/跳舞。No one/No dogs～ed.任何人/狗不许入内。〖同〗permit， let;〖反〗forbid，prohibit;

(2)允给，让得到(let sb have sth)[D+n+n，D+n+prep(to)]：～sb a holiday/freedom/￡100 a week/one glass of wine a day 让某人度假/得到自由/每周得到100英镑/每天喝一杯酒;～sb $100 a month for incidental expenses/for clothes/for books 每月给某人100美元零花钱/买衣服/买书;～a hundred pounds a year to each of one's sons 给每个儿子一年100英镑;He is not～ed visitors.他不许接待来访者。～one's imagination full play(fig)任想象充分发挥;〖反〗refuse;

(3)打折，作价(give as a discount or in exchange)[D+n+n，T+n]：～sb $30 on his old typewriter/￡300 on his old car 给某人的旧打字机作价30美元/旧汽车作价300英镑;(bank)～9% on money kept with it(银行)对存款给予9%的利息;We～no discount.我们不打折。

(4)提供，留(备)出(provide for;set aside for a particular purpose or in estimating sth)[T+n，T+n+prep(for)]：～two sandwiches each/per head给每人/每人两个三明治;clothes cut to～freedom of movement 裁剪得留有活动自如余地的衣服;～an inch for shrinkage/3 meters for a long dress/an hour for changing trains留出一英寸的缩水余量/备三米料子做一件长衣服/打出一小时换车时间;〖同〗grant，give，provide;

(5)认可，承认(agree or admit that sth is true)[T+n，T+that，C+n+to-inf(be)]：The judge～ed the claim.法官认可这要求是正当的。The judge～ed that the claim was reasonable/she had the right to appeal.法官认定这要求是合情合理的/她有权上诉。～that sb is right/one is wrong/some mistakes have been made 承认某人是正确的/自己错了/出现了一些错误;～sb to be a genius/a brave man 承认某人是天才/勇敢者;

allow for (v prep)把……考虑在内(vt)：A～ing for delays/bad weather/the possibility of fog，we need three hours.考虑到耽搁/天气不好/有可能下雾，我们需要三个小时。We must～for exceptions/an emergency/his youth/the train being late.我们应该考虑到可能有例外的情况/万一出现紧急情况/他还年轻/火车可能晚点。

allow of (v prep)容许(vt)：The rules do not～of misinterpretation/any variation/any other explanation.这些规则不容许曲解/任何变更/作别的任何解释。

allow in/out/up，etc(v prep/adv)允许进入/出去/起来(vt)：not～dogs in(to)the house/prisoners out/patients up 不许狗进屋/囚犯出去/病人起床;

→ al′lowable adj 可允许的;al′lowance n 津贴，零用钱;折价;

【辨异】allow与permit和let都表示使人得到做某事的权利。allow和permit 常可互换，allow意为不禁止或不阻止;permit则含义较积极，表示正式的同意;let则是前两者的口语用词。