How do you say can better in French?

There isn't a direct translation for "can better" in French. It depends on the context and what you want to express. Here are some possibilities:

If you mean "to improve" or "to do better":

* S'améliorer: This means "to improve" and is the most common way to express this idea.

* Faire mieux: This means "to do better" and is more specific to actions.

* Se surpasser: This means "to surpass oneself" and implies exceeding expectations.

Example sentences:

* Il peut s'améliorer. (He can improve.)

* Elle peut faire mieux. (She can do better.)

* Nous pouvons nous surpasser. (We can surpass ourselves.)

If you mean "to be able to do better":

* Être capable de faire mieux: This translates to "to be able to do better."

* Pouvoir faire mieux: This translates to "to be able to do better."

Example sentences:

* Je suis capable de faire mieux. (I am able to do better.)

* Vous pouvez faire mieux. (You can do better.)

In general, it's best to consider the specific context and choose the most appropriate phrase.