

Не надо упоминать об этом при маме.
Don't mention it in front of Mom.
Он часто упоминает своего старшего брата.
He often mentions his older brother.
Ты не упоминал, что у тебя есть сестра.
You didn't mention that you have a sister.
"упоминать" 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.