1.fan的基本意思是用手拿东西来回摆动,使空气流动,从而带来风。可用作及物动词,也可用作不及物动词。用作及物动词时,后可接名词或代词作宾语; 用作不及物动词时,后可接副词out表示“分散,展开”“展成扇形”。
2.fan可引申指由于粗鲁或虐待而使人愤怒或仇恨。
3.fan可用于被动结构。

fan out (v.+adv.)
(使)分散,展开 (cause to) scatter or spread
▲fan out
The searchers fanned out to look for the missing boy.搜寻人员四下散开寻找失踪的孩子。
The troops fanned out as they advanced.部队向前推进时呈扇形散开。
▲fan sth⇔ out
He fanned out the cards in his hand.他把手中的纸牌呈扇形展开。

用作及物动词
▲S+～+n.
We fanned the fire to make it burn brighter.我们扇火使它烧得更旺些。
She fanned her face with a newspaper.她用报纸朝脸上扇风。
He is fanning his face with a small fan.他用一把小扇子往自己脸上扇风。
His rudeness fanned her irritation into anger.他的粗鲁使她由气恼变为愤怒。
◇ 用于be ～ed结构
The flame was fanned by the west wind.西风吹旺了火焰。

［同义词］ n. devotee, enthusiast, follower
［词源］  ＜拉丁语vannus(风扬谷物→扇子) ＜美式英语fanatic(狂热者)

fan用作名词时的基本意思是“扇子”,指用羽毛编成或用纸裁成半圆形用手摇动,或一组金属叶片用马达转动以产生风的用具。引申可指某人或某事物的热情崇拜者或拥护者,即“狂热爱好者”。

She glanced at him from behind her fan.她从扇子后匆匆看了他一眼。
Ladies used to carry fans to keep themselves cool.从前女人都随身带着扇子以保持凉快。
It was so hot that we had to have the electric fan on all day long.天太热,我们不得不全天开着电扇。
There was a blade of an electric fan on the floor.地板上有一片电扇的叶片。
He is such a devoted football fan that he travels with his team.他是一个那么热心的足球迷,以致和他所支持的球队一起旅行。
The fans groaned their disappointment when their team lost.当这个球队输掉时,他们的球迷发出了失望的抱怨声。
The football match was attended by thousands of football fans.几千名足球迷观看了这场足球赛。

fan, enthusiast
这两个词都有“热心者”“忠于…的人”的意思。其区别在于:
fan指对体育运动、电影、戏剧、小说等的狂热爱好者,也指对社会或各界名流等的狂热仰慕者; enthusiast指热衷于信仰、原则、事业等的人。例如:
Football attracts fans of all ages.足球吸引着老少球迷。
He is an enthusiast for politics.他是个热衷于政治的人。