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How to Say ‘It must be’ in French

Ça doit être

💬 Usage Tip: A common way to express an assumption or deduction.

🇫🇷 In France: Deductive reasoning is common in casual French conversations when discussing movies or books.

Word-by-Word Breakdown

Ça

[sah]

that; it; this

Pronoun often used as the subject of a sentence: “That/It…”

Example

Ça doit être un bon seinen, vu les critiques.

It must be a good seinen, judging by the reviews.

doit

[dwah]

must; has to

Form of **devoir** expressing deduction/obligation: *ça doit…* = “it must…”

Example

Ça doit être un shōnen, il y a beaucoup de combats.

It must be a shōnen; there are lots of fights.

être

[ETR]

to be

Infinitive **être** used after **doit**: *doit être* = “must be.”

Example

Ça doit être intéressant si tu aimes les thrillers.

It must be interesting if you like thrillers.

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