

Не надо дуть на суп, он уже остыл.
You don't need to blow on the soup, it's already cooled down.
Закрой, пожалуйста, окно, из него дует.
Please close the window, there's a draft coming from it.
Вчера весь день дул сильный ветер.
A strong wind blew all day yesterday.
"дуть" is in the lesson "Verbs 12" (Level 24), 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.