How do you say he goes to bed in french?

There are a few ways to say "He goes to bed" in French, depending on the context and level of formality:

Formal:

* Il se couche. (This is the most common and neutral way to say it.)

Informal:

* Il va se coucher. (This is slightly more informal and often used in everyday conversation.)

More specific:

* Il va au lit. (This literally means "He goes to the bed" and emphasizes the action of going to the bed itself.)

The best choice will depend on your specific needs.