mít as a Modal — Should, Be Supposed To

You already know mít as "to have" — Mám psa ("I have a dog"). But the very same verb, when it is followed by an infinitive, stops meaning possession and turns into a modal: it expresses what someone should do, what they are supposed to do, or what is expected to happen. Máš to udělat does not mean "you have it to do" — it means "you're supposed to do it." This double life of mít trips up English speakers, because nothing in English is shared between have a dog and should go. This page shows you how to read and produce the modal mít, and how it differs from its stronger cousin muset.

The core idea: an assigned task, not your own urge

Modal mít + infinitive says that an action has been laid on someone from the outside — by a rule, a plan, an instruction, an arrangement, or a sense of what is right. It is the verb of duties, schedules, and expectations. Crucially, the obligation does not come from inside the speaker's will (that would be chtít, "want") nor from raw necessity (muset, "must"). It comes from what was agreed or is proper.

Notice how each of these implies an external source: a parent's instruction, a meeting's schedule, a situation that hands you a problem. That is the fingerprint of modal mít.

The present forms (for assigned duty)

Modal mít uses the ordinary present-tense conjugation of "to have." There is nothing new to learn in the forms themselves — only their meaning shifts.

For the full present paradigm and pronunciation, see the present of mít.

The reproach flavour

When you use present mít about something that was the duty but isn't being done, it carries an unmistakable note of reproach — "and you're not." English does the same thing with stressed supposed to: "You're supposed to be working."

Expected events: the schedule sense

A second everyday use of present mít has no human duty at all: it reports what is scheduled or expected to happen. Trains, deliveries, weather, results — anything on a timetable or a forecast.

That last example slips into the past — let's look at how the past works, because it is where the "was supposed to (but...)" meaning lives.

The past: "was supposed to" — and usually didn't happen

Modal mít forms its past exactly like the verb "to have": the l-participle měl / měla / mělo plus the past auxiliary. The meaning is "was supposed to," and it very often implies the thing did not actually happen.

The note on neuter participles matters here: the neuter singular ends in -o (mělo), and the neuter plural ends in -a (měla — same spelling as the feminine singular but referring to several neuter things). So Ta města měla být opravena ("Those towns were supposed to be repaired") uses the neuter-plural -a.

The conditional měl bych — the everyday "should"

Here is the form English speakers reach for most often, because plain should (advice, a recommendation, the right thing to do) is in Czech the conditional of mít: měl bych + infinitive. This is softer and more personal than present mám — it is your opinion about what would be good, not a duty handed down.

The little word by (and its person-marked forms bys, bychom, byste) is the conditional particle; it is a second-position clitic, so it jumps to the second slot of the clause and you may see it separated from měl. For the full mechanics, see the present conditional and polite requests with the conditional.

mít vs muset: should/supposed-to vs must

The cleanest way to feel the difference is to put them side by side. muset is hard necessity — there is no real choice. mít is softer: a duty, an expectation, the proper thing, but the world will not collapse if it slips.

That one sentence captures the whole contrast: nemusíš removes the necessity, měl bys adds the recommendation. For the strong-obligation verb in full, see muset — must, have to, and for the must/must-not pair, muset vs nesmět.

Common Mistakes

English speakers often try to translate "should" with a bare by/bych. But Czech builds "should" from the conditional of mít, so the participle měl/měla is obligatory: měl bych jít, never bych jít.

For a scheduled, expected event, use má, not musí. Musí přijet sounds like an obligation imposed on the train, which is odd; má přijet is the natural "is due to."

To negate the obligation, the ne- attaches to mít (nemáš), giving "you're not supposed to." Putting ne- on the infinitive instead negates the action, which is rarely what you mean.

This is the reverse trap: when there is no infinitive, mít is back to plain "have," and its object takes the accusative (jednoho psa). The modal reading only appears when an infinitive follows.

In the past modal, the short adverb tam usually slots in before the infinitive (měl jsem tam být), following Czech's strong preference for placing such elements early in the clause.

Key Takeaways

• mít + infinitive = an obligation or expectation from outside you: a rule, instruction, plan, or schedule.
• Present (mám, máš, má…) = an assigned duty ("you're supposed to") or a scheduled event ("the train is due to").
• Past (měl, měla, mělo / plural měly, měla) = "was supposed to," usually with the implication it didn't happen.
• Conditional (měl bych, měl bys…) = the everyday "should" — your advice or recommendation. This is what English "should" most often becomes.
• Contrast: muset = hard "must," mít = soft "supposed to," měl by = "should." And without an infinitive, mít is just "have."