

Mit achtzehn darf man Auto fahren.
[ˈmɪt ˈaxtseːn ˈdarf ˈman ˈaʊ̯to ˈfaːrən.]
At eighteen you're allowed to drive a car.
Wann wirst du achtzehn?
[ˈvan ˈvɪrst ˈduː ˈaxtseːn?]
When do you turn eighteen?
Das Konzert beginnt um achtzehn Uhr.
[das kɔnˈtsɛrt bəˈɡɪnt ˈʊm ˈaxtseːn ˈuːɐ̯.]
The concert starts at six p.m.
"achtzehn" is in the lesson "Numbers" (Level 3), along with 19 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.