I wrote
I wrote something.
I wrote a poem.
I wrote this book.
That's what I wrote.
J'ai écrit plusieurs papiers sur le sujet.
I’ve written several papers on the subject.
I wrote a book.
Avez-vous lu ce que j'ai écrit ?
Did you read what I wrote?
J'ai écrit beaucoup d'histoires.
I have written many stories.