请问,use with by in 的区别

use是动词,其他三个是介词.using可当动词性质用,强调用途.
例：I opened the door using a key.
with强调用什么样的物资.
例：They made a temporary rudder with planks.
by强调用什么工具,办法,或者什么人.
例：He was knocked down by a car.
in强调用一种语言,或一些抽象的方式.
例：I explained to you in Chinese.