allow的用法如下：
1、允许；准许
to let sb/sth do sth; to let sth happen or be done
[VN to inf] 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。
He is not allowed to stay out late.
他不可以在外待到很晚。
They shouldn't be allowed to get away with it.
不应就此放过他们。
She won't allow herself to be dictated to.
她不会听人摆布的。
He allowed his mind to wander.
他听任自己的思绪信马由缰。
[VN] Smoking is not allowed in the hall.
大厅内不准吸烟。
[V -ing] We do not allow smoking in the hall.
我们不准有人在大厅内吸烟。
2、[VNN] 给予
to let sb have sth
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。
I'm not allowed visitors.
我不可以接见来访者。
3、[VN , usually + adv./prep.] [usually passive] 允许进入（或出去、通过）
to let sb/sth go into, through, out of, etc. a place
No dogs allowed (= you cannot bring them in) .
不准携狗入内。
The prisoners are allowed out of their cells for two hours a day.
囚犯每天可以放风两小时。
The crowd parted to allow her through .
人群向两旁闪开让她通过。
You won't be allowed up (= out of bed) for several days.
你将有几天不能下床。
使可能 make possible
4、使可能
to make sth possible
[VN] A ramp allows easy access for wheelchairs.
坡道便于轮椅进出。
[also V -ing]
时间；金钱；食物 time/money/food, etc.
5、[VN] ~ sth (for sb/sth)
（为某目的）留出，给出
to make sure that you have enough of sth for a particular purpose
You need to allow three metres of fabric for the dress.
这身衣服你需要用三米布料。
接受；承认 accept/admit
6、(formal) 接受；承认；同意（某事属实或正确）
to accept or admit sth; to agree that sth is true or correct
[VN] The judge allowed my claim.
法官同意我的要求。
‘Objection!’ ‘I'll allow it.’
“反对！”“反对成立。”
[V that] He refuses to allow that such a situation could arise.
他拒不承认这种情况可能发生。
[VNN] She was very helpful when my mother was ill─I'll allow you that.
我母亲生病时她帮了很大的忙——我同意你说的这一点。
拓展资料
1、VERB 允许；容许；准许
If someone is allowed to do something, it is all right for them to do it and they will not get into trouble.
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。
2、VERB 向…提供;准许得到
If you are allowed something, you are given permission to have it or are given it.
Gifts like chocolates or flowers are allowed...
巧克力、鲜花等礼物在允许之列。
3、VERB 听任;任凭
If you allow something to happen, you do not prevent it.
He won't allow himself to fail...
他不会任由自己失败的。