

Мне тяжело бежать в гору.
It's hard for me to run uphill.
Сколько километров нам ещё бежать?
How many more kilometers do we have to run?
Не могу больше бежать, давай отдохнём.
I can't run anymore, let's take a break.
"бежать" is in the lesson "Sports 1" (Level 23), along with 13 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.