There is another group of verbs that have the change i — y in the preterit in the third person singular and plural. This change occurs because the unstressed i appears between two vowels. The following conjugation illustrates this spelling change. Note that in all of the other forms of the verb, there is a written accent over the í.
[table id=87 /]
The following verbs follow the same pattern:
[table id=88 /]
There is another slightly different verbal pattern in the preterit in which i — y. This group of verbs ends in -uir. This group is different from the previous one because the written accent occurs only over the yo form of the verb (1). The vowel -i- in the remaining verbal endings (second person singular, first and second person plural) does not receive a written accent. The following conjugation illustrates this spelling change.
[table id=89 /]
Verbs bellow follow the same pattern:
[table id=90 /]