of 和 for with和 by 怎么区分??

of。‘...的’， a box of pencils. 一盒子的铅笔。
for. ‘为了’，I will wait for you. 我会为你等待。
with‘..和’，Please stay with me.请和我在一起。
by ‘乘，被..' I like travelling by sea.我喜欢乘船旅游。 He was killed by you.他被你杀了。

of 是..的 by 是通过....