In the Portuguese language, we have some verbs of the third conjugation (that is, verbs ending in -IR) that undergo a graphical change in a vowel.
Here are some examples of verbs that undergo this graphical change: “PREFERIR = to prefer”, “SENTIR = to feel”, “DORMIR = to sleep”.
This transformation occurs ONLY in the present tense and only in the first person singular, that is, when we conjugate the verb for the personal pronoun “EU = I”.
Here are some examples: 1-Verb PrefErir (to prefer). Eu prefIro sopa! 2-Verb SEntir (to feel). Eu sInto o frio da rua.
PRO TIP: There are two types of transformation. Sometimes the vowel changes from E to I. Example 1 – PREFERIR. Eu prefIro.
We also have verbs that change the vowel from O to U. Example: DORMIR. Eu dUrmo 7 horas. The verb “preferir” is probably the verb with these characteristics that we conjugate most often in our daily life. For this reason, we suggest that you invest some extra effort in memorizing the correct conjugation of this verb (“preferir” verb).