| A | B |
| contar (o>ue) | to count |
| morir (o>ue) | to die |
| almorzar (o>ue) | to have lunch |
| recordar (o>ue) | to remember |
| poder (o>ue) | to be able to; can |
| costar (o>ue) | to cost |
| volver (o>ue) | to return |
| encontrar (o>ue) | to find; to encounter |
| dormir (o>ue) | to sleep |
| comenzar (e>ie) | to start; to begin |
| empezar (e>ie) | to start; to begin |
| querer (e>ie) | to want; to love |
| entender (e>ie) | to understand |
| pensar (e>ie) | to think; to consider |
| conseguir (e>i) | to get; to obtain |
| perder (e>ie) | to lose |
| preferir (e>ie) | to prefer |
| jugar (u>ue) | to play (sport/game) |
| repetir (e>i) | to repeat |
| servir (e>i) | to serve |
| pedir (e>i) | to ask for; to request |
| competir (e>i) | to compete |
| contar | o>ue - to count |
| morir | o>ue - to die |
| almorzar | o>ue - to have lunch |
| recordar | o>ue - to remember |
| poder | o>ue - to be able to; can |
| costar | o>ue - to cost |
| volver | o>ue - to return |
| encontrar | o>ue - to find; to encounter |
| dormir | o>ue - to sleep |
| comenzar | e>ie - to start; to begin |
| empezar | e>ie - to start; to begin |
| querer | e>ie - to want; to love |
| entender | e>ie - to understand |
| pensar | e>ie - to think; to consider |
| perder | e>ie - to lose |
| preferir | e>ie - to prefer |
| jugar | u>ue - to play (sport/game) |
| repetir | e>i - to repeat |
| servir | e>i - to serve |
| pedir | e>i - to ask for; to request |
| competir | e>i - to compete |
| conseguir | e>i - to get; to obtain |