STEM CHANGING VERBS

Every INFINITIVE has a STEM (root) and an ENDING,

example:

All STEM CHANGING VERBS follow the same rules:

1. Only the stem of the verb changes
2. The ending of -AR, --ER, & --IR don’t change: 
   --Ar: o, as, a, amos, an
   --Er: o, es, e emos, en
   --Ir:  o, es, e, imos, en
3. Nosotros form does not have a stem change, drop R, add MOS.
   Encontrar: encontramos
   Entender:  entendemos
   Preferir:    preferimos
4. The vowel before last syllable changes(that is the vowel before the AR, ER, or IR ending)
5. O>UE; E>IE; E>I
6. All verbs that change E to I are IR ending verbs.

7. The verb JUGAR is the only verb with the vowel U that changes into UE

*Remember nosotros form, drop R, add MOS.

*Remember nosotros form, drop R, add MOS

*Remember nosotros form, drop R, add MOS

*Remember nosotros form, drop R, add MOS