​On = 3rd person singular verb (“il”verb form)

​The first thing to understand when it comes to “on”, is that no matter its meaning, “on” will ALWAYS take a 3rd person singular verb form, like “il” and “elle”. Example:

On est, on a, on mange... We are, we have, we eat...

​On is used to replace "someone"

​In the same spirit "on" can be used to replace someone. Example:

Ecoutes si on te parle​...Listen if someone talks to you.

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​On means people in general

In this case "on" can be interpretated as "people"​. Example:

En France on mange son hamburger avec une fourchette​....People eat their burger with their forks.

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