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Je dois rendre le livre demain.

Je dois rendre le livre demain.
I must return the book tomorrow.
FromLesson 25inHardcore French

Breakdown of Je dois rendre le livre demain.

je
I
le livre
the book
demain
tomorrow
devoir
must
rendre
to return

Questions & Answers about Je dois rendre le livre demain.

Why is it rendre and not retourner?

In French, different verbs cover different kinds of “return”:

  • rendre (quelque chose à quelqu’un/quelque part): to give back to the owner/issuer. Natural for library books: rendre le livre à la bibliothèque.
  • retourner: to go back (to a place) or to turn over; also “to send back” goods to a seller: retourner un colis au vendeur. Not used for giving a loaned book back to a library in everyday French.
  • rapporter: to bring something back to where you got it: rapporter un livre à la bibliothèque (possible, focuses on physically bringing it back).
  • ramener: to bring back (often a person, but can be an object). For a library book, rendre is the safest, most idiomatic choice.
Where does demain go in the sentence?

Most natural placements:

  • End: Je dois rendre le livre demain.
  • Fronted for emphasis: Demain, je dois rendre le livre. Avoid splitting the object and the verb with demain in neutral style (e.g., Je dois rendre demain le livre sounds stiff).
How do I say “I don’t have to return the book tomorrow” vs “I mustn’t return the book tomorrow”?
  • Don’t have to (no obligation):
    • Je n’ai pas besoin de rendre le livre demain.
    • Je ne suis pas obligé de rendre le livre demain.
    • Je n’ai pas à rendre le livre demain.
  • Mustn’t (prohibition/advice not to):
    • Je ne dois pas rendre le livre demain. (commonly understood as “mustn’t/shouldn’t”)
    • Il ne faut pas que je rende le livre demain.
Could I use the future: Je devrai rendre le livre demain?

Yes, but it changes the nuance:

  • Je dois rendre le livre demain: current obligation concerning tomorrow (the everyday, natural choice).
  • Je devrai rendre le livre demain: the obligation will arise in the future, or you’re projecting about tomorrow’s duties (more detached/planned).
If I replace le livre with a pronoun, where does it go?

Before the infinitive:

  • Je dois le rendre demain. (not: ✗ Je le dois rendre) With a person recipient:
  • Je dois le lui rendre demain. = I must return it to him/her tomorrow.
How do I add who or where I’m returning it to?

Use à for the indirect object:

  • rendre le livre à la bibliothèque
  • rendre le livre à Marie With pronouns:
  • Je dois le lui rendre demain. (it + to him/her) If you include a place pronoun:
  • Je dois le rendre à la bibliothèque demain.
  • More compact but formal/rare in speech: Je dois l’y rendre demain. (it + there)
Why is it le livre and not un livre, mon livre, or ce livre?
  • le livre: the specific book known from context (most natural if both speakers know which book).
  • un livre: any book, not specific.
  • ce livre: this/that particular book (pointing it out).
  • mon livre: my book (ownership). For a library book, le or ce is usually better, though people sometimes say mon livre meaning “the book I have.”
How is devoir conjugated here?

Present tense:

  • je dois, tu dois, il/elle/on doit, nous devons, vous devez, ils/elles doivent Useful past forms:
  • j’ai dû (I had to), je devais (I had to/was supposed to, ongoing/background)
Can I say the same idea with falloir?

Yes:

How do I pronounce the sentence naturally?

Tips:

  • je ≈ “zhuh” (often reduced: “j’”)
  • dois ≈ “dwah”
  • rendre ≈ “rahn-dr” (nasal vowel in -en-; final -e silent)
  • le ≈ “luh” (often very light)
  • livre ≈ “leevr” (French uvular r)
  • demain ≈ “duh-ma(n)” with nasal ending Liaison is common between dois and rendre: dois‿rendre sounds like “dwaz-rendre.”
How do I ask “Do I have to return the book tomorrow?” in French?
How can I say “by tomorrow” or “before tomorrow”?
  • avant demain: before tomorrow.
  • d’ici demain: by tomorrow (between now and tomorrow).
  • pour demain: for tomorrow/with tomorrow as the deadline (common for homework/tasks). Examples:
  • Je dois rendre le livre d’ici demain.
  • Le rapport est pour demain.
How do I talk about the past with these verbs?
  • Completed return: J’ai rendu le livre hier.
  • Had to return: J’ai dû rendre le livre hier.
  • Ongoing/expected obligation in the past: Je devais rendre le livre hier.
How do I say “I should return the book tomorrow” or “I’m supposed to…”?
  • Advice/softer obligation: Je devrais rendre le livre demain.
  • Expectation/supposed to: Je suis censé(e) rendre le livre demain.
Do I need a preposition before the infinitive after devoir?

No. It’s devoir + infinitive with no preposition:

  • Je dois rendre… Compare with verbs that take de:
  • J’ai besoin de rendre…
  • J’essaie de rendre…
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