Ⅰ. among “在……之中/中间” 指三者或三者以上。通常表某个范围。如：
① Someone is wrong among us. 我们中间有人错了。
② There is a small village among the mountains. 大山之间有座小村庄。
Ⅱ. between “在…之间”指在二者之间，有时与and 连用。如：
① There is a river between us. 在我们两人之间有一条河。
② I’m standing between a house and a big tree. 我站在一座房子和一棵大树中间。
Ⅲ. in the middle of “在……中间”指在某事物中间，强调事物的两端的中间。如：
There is a bus stop in the middle of the road. 在这条公路中间有个车站。