

Ты завтра свободен? Тогда пойдём в кино.
Are you free tomorrow? Then let's go to the movies.
Тогда я ещё не работал.
Back then I wasn't working yet.
А где ты жил тогда?
And where did you live then?
"тогда" is in the lesson "Adverbs 5" (Level 41), along with 10 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.