everything I know
That's all I know.
Je t'ai appris tout ce que je sais.
I taught you everything I know.
I have said everything I know.
Je vous dirai tout, tout ce que je sais.
I will tell you everything, everything I know.
— M le maudit (1931)
Je t'ai dit tout ce que je sais.
I told you everything I know.
Clayton, sois tranquille, t'apprendras tout ce que je sais.
Clayton, don't worry, you'll learn everything I know.
— La Cité des hommes (2007)
C'est tout ce que je sais de lui.
That's all I know about him.