If you mean something happened that was not intentional, it should be by accident. "The boy stepped on the cat's tail by accident."
By accident
By
By accident
on accident
Because prepositions can often by exchanged for one another (in this case the prepositions are "by" and on"), either way is grammatically correct in this sentence. I tripped on accident or I tripped by accident. Both are acceptable. Comment: In British English, I'm pretty sure "by accident" is the "proper" form. Oddly enough, "I tripped on purpose" is correct.
The sentence "You tripped over the box by accident" is grammatically correct and properly structured in English. It conveys the idea that the person tripped unintentionally due to the box being in their way.
By Accident
Thimpiste in english is accident
you spell accident in french the same way you spell accident in english; accident
The African Luhya term for the English word 'accident' is "achali".
English is a proper adjective.
The word English is not a proper noun when it is used as a proper adjective. That is an English accent, an English type automobile, an English looking top hat.
What is "do writing?" This does not appear to be proper English. If the question were rephrased in proper English, I think we would know how to answer it.
Not everyone here knows proper English. Others may be lazy and use chat speech. Then of course, some are just young. In addition, there is some debate as to what is proper English. Proper British English is not the same as proper American English. Other English-speaking nations have their own variations of English.
This is French for "what do you do when you have an accident?"
Well, for starters, your question is not proper english.