Stem-changing Verbs in Present Tense (o-ue, e-ie)

querer

• to want
• to begin
• to run
• to have lunch

jugar

• to want
• to have lunch
• to play (a sport)
• to begin

empezar

• to begin
• to want 
• to play
• to sleep

almorzar

• to sleep
• to have lunch
• to play 
• to have a snack

merendar

• to sleep
• to have lunch
• to play 
• to have a snack

dormir

• to sleep
• to have lunch
• to play 
• to have a snack

In present tense Stem-changers all forms change their stem except . . . . 

• vosotros and ellos
• yo and nosotros
• nosotros and vosotros
• tú and él,ella,Ud.

In present tense stem-changing verbs the vowel that changes is . . . 

• the 1st vowel
• the 2nd vowel
• the last vowel
• the 2nd to last vowel

yo/dormir

• dormo
• duermo
• duermoy
• diermo

nosotros/dormir

• duermimos
• dormimos
• durmimos
• dormamos