

My little sister is very clever.
[ˈmaɪ ˈlɪtl̩ ˈsɪstər ˈɪz ˈvɛri ˈklɛvər.]
That's a clever idea!
[ˈðæts ə ˈklɛvər aɪˈdiə!]
He isn't clever, but he works hard.
[hi ˈɪzn̩t ˈklɛvər, ˈbət hi ˈwɜrks ˈhɑrd.]
"clever" is in the lesson "Positive traits" (Level 28), along with 9 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.