Require、demand、request、claim都可以表示要求。具体的区别你知道么?一起来看看吧

Require--一般表示因需要而要求

to need something or make something necessary

需要;有赖于;要求;规定

The rules also require employers to provide safety training.

这些规定也要求雇主们提供安全训练。

What clause do you require in the contract?

你要求在合同中订上什么条款?

Demand

作动词,表示:to ask for something forcefully, in a way that shows that you do not expect to be refused 坚决请求,强烈要求;强要

I demanded an explanation.

我要求给我一个解释。

The union is demanding a seven percent pay rise this year.

汽车工会要求今年加薪7%。

He has always demanded the highest standards of behaviour from his children.

他总是以最高的行为准则来要求自己的孩子。

[ + speech ] "And where do you think you're going?" demanded the police officer.

“你觉得自己在朝哪里走?”警察问道。

[ + to infinitive ] I demand to see the manager.

我要求见经理。

[ + that ] She demanded that he return the books he borrowed from her.

她要求他把从她那里借走的书还回来。

作名词:表示困难的要求

His new job makes a lot of demands on him (= he has to work very hard).

新工作对他要求很高。

Request

 the act of politely or officially asking for something

(礼貌、正式的)要求,请求

They received hundreds of requests for more information.

数以百计的人要求他们提供更多的信息。

[ + to infinitive ] The boss refused our request to leave work early.

老板拒绝了我们早下班的请求。

The clause was added to the contract at Carlos's request (= because Carlos asked for this).

这一条款是在卡洛斯的要求下添加到合同中的。

Claim

 to ask for something of value because you think it belongs to you or because you think you have a right to it 要求(拥有);认领;索取,索  要

The police said that if no one claims the watch, you can keep it.

警方说如果没人认领这块表,你可以留着它。

When King Richard III died, Henry VII claimed the English throne.

理查德三世去世后,亨利七世要求继承英格兰王位。