Usage note
底下用来表示位置在下面。
dǐxia láiyòng bǎozhí zhìdì zài xiàmiàn。
底下 is used to indicate a position below.
Context note
底下常用于描述物体的位置关系，比如桌子底下的猫。
dǐxia cháng yòng yú miáo huì wùtǐ de zhìdì guānxi, bǐrú zhuōzi dǐxià de māo。
底下 is often used to describe the positional relationship of objects, such as a cat under the table.
5 examples
床底下有只小猫。
chuáng dǐ xià yǒu zhī xiǎo māo。
There's a little cat under the bed.
桌子底下的书不见了。
zhuō zi dǐ xià de shū bú jiàn le。
The book under the table has disappeared.
地板底下可能藏了什么东西。
dì bǎn dǐ xià kě néng cáng le shén me dōng xī。
There might be something hidden underneath the floor.
桌子里头有东西，底下的抽屉里也有。
zhuō zi lǐ tou yǒu dōng xī， dǐ xià de chōu tì lǐ yě yǒu。
There are things in the drawer inside the desk, and there are also some under it.
床底下放着一个旧箱子。
chuáng dǐ xià fàng zhe yí gè jiù xiāng zǐ。
An old box is placed under the bed.
5 mini stories
妈妈在打扫房间，发现床底下有一只小猫。
mā ma zài dǎ sǎo fáng jiān， fā xiàn chuáng dǐ xià yǒu yì zhī xiǎo māo。
Mom was cleaning the room and found a little cat under the bed.
爸爸把书放在桌子底下的抽屉里。
bà ba bǎ shū fàng zài zhuō zi dǐ xià de chōu tì lǐ。
Dad put the book in the drawer under the table.
妹妹在玩玩具，不小心把玩具掉到了地板底下。
mèi mei zài wán wán jù， bù xiǎo xīn bǎ wán jù diào dào le dì bǎn dǐ xià。
Sister was playing with toys and accidentally dropped one on the floor underneath.
奶奶说床底下有只老鼠，吓得我赶紧躲到桌子底下。
nǎi nai shuō chuáng dǐ xià yǒu zhī lǎo shǔ， xià dé wǒ gǎn jǐn duǒ dào zhuō zi dǐ xià。
Grandma said there was a mouse under the bed, which scared me so much that I quickly hid under the table.
爸爸检查地板，发现底下的水管漏水了。
bà ba jiǎn chá dì bǎn， fā xiàn dǐ xià de shuǐ guǎn lòu shuǐ le。
Dad checked the floor and found that the pipe underneath was leaking.
Mini dialogue
找东西
A
我的铅笔在桌子底下吗？
Wǒ de qiānbǐ zài zhuōzi dǐxia ma?
Is my pencil under the table?
B
不在底下，我帮你找找。
Bù zài dǐxia, wǒ bāng nǐ zhǎo zhao.
It's not underneath, let me help you look.
小猫藏身
A
小猫躲在椅子底下。
Xiǎo māo duǒ zài yǐzi dǐxia.
The kitten is hiding under the chair.
B
底下很暗，它可能睡着了。
Dǐxia hěn àn, tā kěnéng shuìzháo le.
It's dark underneath, it might be asleep.
Related words and contrasts
similar
下面
xià mian
under, below
下面 is a very common word for 'under' or 'below', similar to 底下.
opposite
上面
shàng mian
on top of, above
上面 means 'above' or 'on top of', the opposite of 底下.
similar
下方
xià fāng
lower part, underneath
下方 is a slightly more formal way to say 'below' or 'underneath'.