

Летом в лесу нельзя сжигать мусор.
You can't burn trash in the forest in the summer.
Осенью мы сжигаем старые листья на даче.
In the fall we burn old leaves at our dacha.
Зачем ты сжигаешь свои старые письма?
Why are you burning your old letters?
"сжигать" is in the lesson "Verbs 8" (Level 20), 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.