Expressing "No Need": не надо / не нужно
To express that an action is unnecessary—that there is "no need" to do it—use the phrases не надо or не нужно followed by an imperfective infinitive.
In negative obligations like this, Russian generally requires the imperfective aspect because you are stating that the action itself should not take place at all. If you want to specify who doesn't need to do the action, use the Dative case (for example, тебе, нам, or ей).
| You do not need to hurry, we have a lot of time. | Тебе не надо торопиться, у нас много времени. |
| Now is the weekend, therefore there is no need to fuss. | Сейчас выходные, поэтому не надо суетиться. |
| You do not need to worry about this. | Тебе не нужно волноваться об этом. |
Prioritizing Comfort and Peace
This structure is very useful when talking about minimizing exertion and prioritizing comfort (удобство) or peace (покой). You will often use it to tell someone not to strain themselves (напрягаться) or to avoid doing extra (лишний) work.
| You do not need to strain yourself, I will do everything myself. | Тебе не нужно напрягаться, я всё сделаю сам. |
| No need to buy extra things for the house. | Не надо покупать лишние вещи для дома. |
| We are resting, no need to make extra movements. | Мы отдыхаем, не надо делать лишние движения. |
Leaving Others in Peace
You can also use this grammar to explain that others should be left alone to rest. Common imperfective verbs for this context include to disturb (беспокоить) and to wake (будить).
| No need to disturb the director, he is busy. | Не нужно беспокоить директора, он занят. |
| We do not need to wake the children, they are sleeping. | Нам не нужно будить детей, они спят. |