

Ich muss zuerst meine Hausaufgaben machen.
[ˈɪç ˈmʊs tsuˈʔeːɐ̯st ˈmaɪ̯nə ˈhaʊ̯sʔaʊ̯fˌɡaːbn̩ ˈmaxn̩.]
I have to do my homework first.
Wer war heute zuerst im Büro?
[ˈveːɐ̯ ˈvaːɐ̯ ˈhɔɪ̯tə tsuˈʔeːɐ̯st ˈɪm byˈroː?]
Who was in the office first today?
Lass uns zuerst etwas essen.
[ˈlaːs ˈʊns tsuˈʔeːɐ̯st ˈɛtvas ˈɛsn̩.]
Let's eat something first.
"zuerst" is in the lesson "Adjectives 7" (Level 45), 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.