须要的英文：
must
have to

Alas, I must ask you to be patient, sir.
唉，我必须要要求你有点耐心，长官。

They have got to abide by the rules.
他们必须要遵守规定。

This dirty floor wants a scrub.
这地板脏了，须要擦洗一下。

The sliver must therefore be attenuated.
因此，必须要拉细条子。

Great designs require great consideration
宏伟的计划须要慎重考虑

It takes patience to educate children.
教育儿童须要耐心。

The leaders must set an example by personally taking part.
领导必须要身体力行。

Brave actions never want a trumpet
勇敢的行为不须要吹号

A politician must be discreet.
一个政治家必须要谨慎

A carpenter must measure accurately.
木工必须要测量准确。

We must act, we must act quickly.
我们必须行动，立即行动。

You must synthesise various opinions.
你必须综合各方面的意见。

You must not relax your efforts.
你不可以松懈你的努力。

You must keep calm in an emergency.
在紧急关头要保持镇静。

You must give way to betters.
你必须让长者先行。