

Надо чаще улыбаться.
You should smile more often.
Почему ты перестал улыбаться?
Why did you stop smiling?
Ребёнок начал улыбаться маме.
The baby started smiling at its mom.
"улыбаться" is in the lesson "Verbs 1" (Level 1), 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.