everyone，每個人，someone，某個人，都是用來指代人的代詞，後面接定語從句需要用“who”來引導

應該用who

1 在限制性定語從句中，當先行詞指人時，關係詞可用who(m)或that，二者常可互換。

但在下列情況中，用who(m)，而不用that：

(1) 當先行詞是one, ones, any, few, anyone, anybody, someone, somebody, everyone,

everybody等詞時。如：

Is there anyone who can answer this question?

He was among the few who managed to live through the enemy prison camp.

注：在非正式文體中可以說：You’re the one that knows where to go.)

(2) 當先行詞是he, they, those, people, person等詞時。如：

He who wants to catch fish just not mind getting wet.

Those who are against the proposal put up your hands.

注：在固定結構的諺語或習語中，可用he that…。如：

He that promises too much means nothing.

(3) 當先行詞有較長的後置定語修飾時。如：

Do you know the writer in blue with thick glasses who is speaking at the meeting?

(4) 在分隔式定語從句中，若先行詞指人，為了明確修飾關係，應當用who(m)。如：

A new master will came tomorrow who will teach you German.

There’s only onestudent in the school who/whom I wanted to see.

I was the only person in my office who was invited.

(5) 兩個定語從句同時修飾一個指人的先行詞，第二個定語從句常用who(m)來引導，如：

She is the only girl I know who can play the guitar.

everyone用who引導定語從句

someone用who或者是that引導定語從句

每個人

everyone是不定代詞，意思是“每個人，人人”，其同義詞是everybody。作主語時，謂語動詞用單數形式.everybody其後不能接of短語要改成everyone後才能加of短語。

Someone，英語單詞，代詞，作代詞時意為“有人，某人；重要人物”。

單數，everyone指每一個，例如everyoneofus指“我們中的每一個”，everyone是主語，後面用第三人稱單數形式。