

I sat on a big rock.
[aɪ ˈsæt ˈɔn ə ˈbɪɡ ˈrɑk.]
Don't climb that rock, it's dangerous.
[ˈdoʊnt ˈklaɪm ˈðæt ˈrɑk, ˈɪts ˈdeɪndʒərəs.]
Is there a rock under my tent?
[ˈɪz ˈðɛr ə ˈrɑk ˈəndər ˈmaɪ ˈtɛnt?]
"rock" is in the lesson "Camping 1" (Level 18), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,375 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.