

I read a book while I was waiting.
[aɪ ˈrid ə ˈbʊk ˈwaɪəl aɪ wəz ˈweɪtɪŋ.]
Can you hold my bag while I pay?
[kən jə ˈhoʊld ˈmaɪ ˈbæɡ ˈwaɪəl aɪ ˈpeɪ?]
Don't use your phone while you're driving.
[ˈdoʊnt ˈjuz jər ˈfoʊn ˈwaɪəl ˈjɔr ˈdraɪvɪŋ.]
"while" is in the lesson "Time 2" (Level 35), 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.