I watch on TV可以把on换成by吗?on与by表“通过‘时有何区别?

题目

I watch on TV可以把on换成by吗?on与by表“通过‘时有何区别?

答案

on是“我从电视上看到的”的意思,改成by后就什么都不是了.by是通过某种媒介、方法、方式的意思如：by bus,by car.I wrote to him by email.I find the word by looking through the whole book.on是通过⋯;...