For the present tense:
* "est": This is the most common translation and is used for the third person singular of the verb "être" (to be).
* Example: "Il est grand" (He is tall).
* "sont": This is used for the third person plural of the verb "être".
* Example: "Ils sont grands" (They are tall).
For questions:
* "est-ce que": This is a common way to start a question in French. It literally means "is it that".
* Example: "Est-ce que tu es prêt?" (Are you ready?)
* "est-il": This is a more formal way to start a question, and it is used for the third person singular.
* Example: "Est-il possible?" (Is it possible?)
For other situations:
* "être": You can also use "être" by itself when referring to the state of being.
* Example: "C'est un livre" (It is a book).
It's important to remember:
* The translation of "is" depends on the subject of the sentence and the tense.
* There are other ways to express the idea of "is" in French, such as using adjectives or adverbs.
Let me know if you'd like a specific example sentence, and I can give you the best translation for "is" in that context!