大家都知道的英文：
it be known that
it be well-known that
it can be known that
it can be well-known that
it may be known that
it may be well-known that
it must be known that
it must be well-known that
it should be known that
it will be known that

参考例句：

It is well known that iron is a good conductor.
铁是良导体这是我们大家都知道的。

A SUNFLOWER is a sunflower. A mobile phone is a mobile phone.
大家都知道，向日葵和手机，一个是植物，一个是机器，二者是截然不同的。

Everybody knows she is close with money.
大家都知道她花钱很小气。

The Businessman was known for keeping his word.
大家都知道那位生意人是很守信用的。

Everyone knew that he had failed her.
大家都知道他辜负了她。

Now it is well known that the Earth's path round the sun is elliptical.
现在大家都知道地球绕太阳的轨道是椭圆形的。

It is known By the name of perseverance in a good cause, and of oBstinacy in a Bad one
大家都知道，毅力用于褒义而顽固用于贬义

We know that AIDS is transmissible from male to female.
大家都知道，艾滋病可以由男性传给女性。

Everyone remembers him as a professional baseball player.
大家都知道他曾经是位职业棒球运动员。

"Possibly my father-in-law trusted to its general notoriety."
“可能的，我的岳父大概以为这件事大家都知道的了。”

known是什么意思：
adj. 已知的；知名的；大家知道的
v. know的过去分词

This is a known fact.
这是众所周知的事实。

It is known as chiromancy.
手相术以此而闻名。

She is a nationally known writer.
她是全国知名作家。

can是什么意思：
v. 能够，可以（情态动词）
n. 罐头；容器
v. 把（食品等）装罐保存

Canning Canning Beef can be satisfactorily preserved by canning if the proper procedures are used.
装罐如果装罐步骤正确,牛肉可很好地保存起来。

Dark thoughts can be softened when they can not be brightened.
阴郁的思绪在无法变得快活的时候可以获得安抚。

He that can have patience can have what he will.
唯坚忍者始能遂其意志。

may是什么意思：
modal v. 也许，可能；可以；会；能够；但愿
n. 山楂属植物；（May）五月

international mai
国际邮政

There may be an announcement about this tomorrow or not,as the case may be.
这件事明天可能有个声明，也可能没有，那要看情况了。

On May Day a pretty girl is chosen the May Queen.
在五月节那一天一位漂亮的少女会被选为五月皇后。