Usage note
“扇”是一个量词，用来表示门、窗等可以开合的东西。
“Shàn” shì yī gè liàngcí, yòng lái biǎoshì mén, chuāng děng kěyǐ kāihé de dōngxi.
“扇” is a measure word used for things that can open and close, like doors and windows.
Context note
当我们说“一扇门”或“一扇窗”时，就是在用“扇”这个量词。
Dāng wǒmen shuō “yī shàn mén” huò “yī shàn chuāng” shí, jiù shì zài yòng “shàn” zhège liàngcí.
When we say “one door” or “one window,” we are using the measure word “扇”.
5 examples
教室里有两扇门。
jiào shì lǐ yǒu liǎng shàn mén。
There are two doors in the classroom.
请打开那扇窗户。
qǐng dǎ kāi nà shàn chuāng hù。
Please open that window.
这扇门很重。
zhè shàn mén hěn zhòng。
This door is very heavy.
我家有三扇窗户。
wǒ jiā yǒu sān shàn chuāng hù。
My home has three windows.
那扇门是红色的。
nà shàn mén shì hóng sè de。
That door is red.
5 mini stories
小明推开一扇门，走进了教室。
xiǎo míng tuī kāi yí shàn mén， zǒu jìn le jiào shì。
Xiao Ming pushed open a door and walked into the classroom.
他看到一扇窗户外面有美丽的花。
tā kàn dào yí shàn chuāng hù wài miàn yǒu měi lì de huā。
He saw beautiful flowers outside a window.
小红关上那扇门，房间安静了。
xiǎo hóng guān shàng nà shàn mén， fáng jiān ān jìng le。
Xiao Hong closed that door, and the room became quiet.
老师打开一扇窗户，让新鲜空气进来。
lǎo shī dǎ kāi yí shàn chuāng hù， ràng xīn xiān kōng qì jìn lái。
The teacher opened a window to let fresh air in.
每扇门后面都有一个惊喜。
měi shàn mén hòu miàn dōu yǒu yí gè jīng xǐ。
Behind every door there is a surprise.
Mini dialogue
开门
A
这扇门怎么打不开？
Zhè shàn mén zěnme dǎ bù kāi?
Why can't I open this door?
B
那扇门锁了，试试这扇。
Nà shàn mén suǒ le, shì shì zhè shàn.
That door is locked, try this one.
关窗
A
请把那扇窗户关上。
Qǐng bǎ nà shàn chuānghu guān shàng.
Please close that window.
B
好的，这扇也关吗？
Hǎo de, zhè shàn yě guān ma?
Okay, should I close this one too?
Related words and contrasts
related
门
mén
door
扇 is the measure word for doors, e.g., 一扇门 (one door).
related
窗户
chuānghu
window
扇 is also used for windows, e.g., 一扇窗户 (one window).
contrast
把
bǎ
MW for objects with handles
把 is a measure word for fans (扇子), but 扇 is the MW for doors/windows.