обещать vs пообещать

obeshchát' vs poobeshchát' — promise habitually/in progress vs make one promise

What it really means

Обещать describes promising as a habit, process, or general commitment. Пообещать is the perfective act of giving a particular promise, often followed by an infinitive or a clause with что.

Examples in natural speech

Он часто обещает помочь, но забывает.
He often promises to help but forgets.
Она пообещала позвонить вечером.
She promised to call in the evening.
Не обещай того, чего не сможешь сделать.
Do not promise what you will not be able to do.
Я пообещал быть вовремя.
I promised to be on time.
Компания обещает ответить в течение дня.
The company promises to reply within the day.

Common mistakes

Do not use пообещать for a standing assurance or repeated behaviour: Компания обещает ответить describes what it says as a policy or current assurance. Пообещала ответить identifies the moment a specific commitment was made.

Memory tip

The prefix по- turns words into a sealed commitment: first someone пообещал, then listeners can hold them to that one promise.

Frequently asked questions

Can both verbs take an infinitive?

Yes: обещать помочь and пообещать помочь. The first can describe a recurring or current promise; the second records one promise made.

What is the difference between «обещал» and «пообещал»?

Обычно обещал gives background or repeated context, while пообещал highlights the completed act of committing oneself on a particular occasion.

How do I ask for a promise politely?

Use the perfective future: Пообещаешь не опаздывать? It asks the person to make a single commitment now.

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