by vs with

anwer the question HOW

BY

WITH

BY + V-ing

explain how sth is done

I turn on the computer by pushing (presionando) the "on" button

nouns:

-communication

-transportation

I conctact you by email

I came by car

nouns:

-body parts

-tools

-instrument

I cleand the floor with a mop

I point with my fingers

many expressions

send sth by post / email

contact sb by phone /facebook

do sth by hand

pay by credit card / cheque

but we say:

pay cash / pay in cash

by mistake / by chace / by accident

but we say:

on purpose

but we say:

"on foot"

when we say my car / a car/ the car we don't use by

instead we use

"IN" for car and taxi

"ON" for bicycle and public transportation

https://www.engvid.com/learn-english-by-or-with/