

Не надо забывать ключи дома.
Don't forget your keys at home.
Я начал забывать английский.
I've started forgetting my English.
Как можно забывать про маму?
How can you forget about your mom?
"забывать" is in the lesson "Verbs 22" (Level 45), 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.