-ar preterite is é aste ó amos aron
-er/ir forms are í iste ió imos ieron

-ar preterite is é aste ó amos aron
-er/ir forms are í iste ió imos ieron

Verbs ending is -uir (not guir) change the "i"
of the endings third singular and plural to "y"
The same is true of many stems with a vowel on the end
like leer, oír, creer, caer, poseer

The only verbs that have a change in the stem
Are -ir verbs, you must remember them
Third person stems will have the vowel replaced
By u or i, just one letter in its s___e

Because i's and e's soften g's and c's
Sometimes a spelling change is what you need
Don't let an ending change the way you say
The last letter of the stem--make a consonant change

See also:
JustSomeLyrics
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65.112
Chris Tomlin Let Your Mercy Rain (See The Morning Album Version) Lyrics
City Hunter Kitadai Momoko - Escape Lyrics