When students practice minimal pairs, they can hear and make small alterations between vowels.

PairIPAContrast
ship / sheep/ʃɪp/ vs. /ʃiːp//ɪ/ vs. /iː/
bit / beat/bɪt/ vs. /biːt//ɪ/ vs. /iː/
live / leave/lɪv/ vs. /liːv//ɪ/ vs. /iː/
cat / cart/kæt/ vs. /kɑːt//æ/ vs. /ɑː/
bat / bar/bæt/ vs. /bɑːr//æ/ vs. /ɑː/
cut / cot/kʌt/ vs. /kɑt//ʌ/ vs. /ɑ/
luck / lock/lʌk/ vs. /lɑk//ʌ/ vs. /ɑ/
bud / bod/bʌd/ vs. /bɑd//ʌ/ vs. /ɑ/
fill / feel/fɪl/ vs. /fiːl//ɪ/ vs. /iː/
pick / peak/pɪk/ vs. /piːk//ɪ/ vs. /iː/