

Не нужно меня благодарить, это пустяк.
There's no need to thank me, it's nothing.
Я благодарю вас за помощь.
I thank you for your help.
Мы долго благодарили врачей за всё.
We thanked the doctors for a long time for everything.
"благодарить" is in the lesson "Verbs 3" (Level 5), along with 15 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.