How do you say i must study in french?

There are a few ways to say "I must study" in French, depending on the context and the level of formality you want to convey:

Formal:

* Il faut que j'étudie. (This is the most common and literal translation)

* Je dois étudier. (This is a more direct way of saying "I must")

Informal:

* Je suis obligé(e) d'étudier. (This emphasizes the obligation)

* Je suis censé(e) étudier. (This implies that it is expected of you)

* J'ai besoin d'étudier. (This focuses on the necessity of studying)

More nuanced:

* J'ai envie d'étudier. (This emphasizes your desire to study)

* J'aimerais étudier. (This expresses your willingness to study)

* J'ai besoin de me concentrer sur mes études. (This focuses on the importance of studying)

The best way to choose the right phrase depends on the situation and your desired tone.