squat down
down 强调向下蹲的动作，后面常接 to do sth 说明目的。
He squatted down to look at the insects.
他蹲下来看那些昆虫。
擅自占用；非法占据；做深蹲；屈膝下蹲；做深蹲运动；擅自占用
To crouch or sit with knees bent, often low to the ground.
屈膝下蹲
To bend deeply at the knees while resting on one's feet.
做深蹲运动
To perform one or more callisthenic exercises by moving the body and bending at least one knee.
擅自占用
To occupy or reside in a place without the permission of the owner.
蹲伏
To sit close to the ground; to stoop, or lie close to the ground, for example to escape observation.
一般现在时
He squats every morning to strengthen his legs.
他每天早上蹲下以增强腿部力量。
一般过去时
Yesterday, she squatted for five minutes straight.
昨天，她连续蹲了五分钟。
现在进行时
They are squatting in the gym right now.
他们现在正在健身房做深蹲。
规则变化：加-ed、-ing、-s
The child squatted down to look at the small frog on the path.
那个孩子蹲下来看小路上的小青蛙。
用法提示：squatted 是 squat 的过去式，后接 down 表示蹲下的动作。
She was squatting in the garden to plant the flowers when it started to rain.
她正蹲在花园里种花，这时开始下雨了。
用法提示：squatting 是 squat 的现在分词，与 was 构成过去进行时，表示蹲着的状态。
The teacher squats to talk to the students at their eye level.
老师蹲下来，以便和学生们平视交谈。
用法提示：squats 是 squat 的第三人称单数形式，表示经常性或习惯性的蹲下动作。
down 强调向下蹲的动作，后面常接 to do sth 说明目的。
He squatted down to look at the insects.
他蹲下来看那些昆虫。
表示蹲在某处，用 on、in、behind 等介词引出位置。
The boy was squatting on the floor, playing with blocks.
男孩蹲在地板上玩积木。
此义指未经房主许可占用房屋或土地，常用 squat in + 建筑物或土地。
Several families squatted in the abandoned building.
几户人家擅自住进了那栋废弃的大楼。
grammar · medium
易错句子He squated down to tie his shoes.
正确表达He squatted down to tie his shoes.
squat 是以“辅音字母+元音字母+辅音字母”结尾的单音节动词，加 -ed 时要双写末尾的辅音字母 t，所以过去式是 squatted，squated 属于拼写错误。
grammar · medium
易错句子I did thirty squat in the gym yesterday.
正确表达I did thirty squats in the gym yesterday.
表示“深蹲”这个健身动作时 squat 是可数名词，数词 thirty 之后必须用复数形式 squats；汉语名词没有单复数变化，容易直接沿用单数。
grammar · medium
易错句子He hurt his knee after squat.
正确表达He hurt his knee after squatting.
这里的 after 是介词而不是连词，介词后面接动词要用动名词形式 squatting 作宾语，不能直接用原形 squat；汉语没有这种词形变化，学习者常漏掉 -ing。
squat 强调臀部下沉靠近脚跟、双脚平放，常指健身深蹲或蹲坐；crouch 强调屈膝并使身体前倾、压低，多为了隐蔽或准备跳起，臀部不一定贴近脚跟。
squat 是脚掌着地、膝盖弯曲而臀部下沉；kneel 是膝盖触地、身体直立或前倾，两者姿势不同，不能互换。
squat 为中性、通用的“蹲”，可指动作或姿势；hunker 多用于 hunker down，美式口语色彩较强，强调蹲下并保持、蜷伏或长期坚守，不用于健身的“深蹲”。
蹲下
He squatted down to tie his shoelaces.
他蹲下来系鞋带。
负重深蹲
She squats with weights every morning to strengthen her legs.
她每天早上负重深蹲以增强腿部力量。
蹲在地板上
The child squatted on the floor to play with the toy.
孩子蹲在地板上玩玩具。
蹲下拿起
Always squat to lift heavy objects to avoid back injury.
总是蹲下拿重物以避免背部受伤。
蹲跳
The coach instructed them to perform squat and jump exercises.
教练指示他们做蹲跳练习。
深蹲是一种常见的运动形式
深蹲是健身房中常见的训练动作
深蹲经常使用负重来增加强度
深蹲主要锻炼腿部肌肉
深蹲有助于提升腿部力量
什么都不知道
He knows squat about cars.
他对汽车一窍不通。
一无所获
I worked all day and got squat for my efforts.
我工作了一整天，但努力毫无回报。
什么都不做
He just sits around doing squat all day.
他整天闲坐着，什么也不做。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.