How the word "быстрый" is translated into English
Какой быстрый поезд!
What a fast train!
Мне нужен быстрый интернет.
I need fast internet.
Это не очень быстрый автобус.
This isn't a very fast bus.
"быстрый" is in the lesson "Adjectives 2" (Level 4), along with 17 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.
