

Не надо стучать, дверь открыта.
No need to knock, the door is open.
Кто-то стучит к нам в окно.
Someone is knocking on our window.
Сосед стучал по стене всю ночь.
The neighbor was banging on the wall all night.
"стучать" is in the lesson "Verbs 6" (Level 18), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.