Use regular ER/IR preterit/past endings. Change the o – u or e – i, in the el, ella, Ud. ellos, ellas, Uds. forms only. DO NOT change o – ue or e – ie those are present tense changes only!!

Which of the following are IR stem changing verbs?? navegar vender enviar dormir salir vivir despertarse acostarse vestirse comer

Use regular endings!!! 3 rd person has a change in the stem!!

These are the most common box D verbs. Learn them, these verbs have irregularities in many other parts of speech!! Dormir – to sleepvestirse – to get dressed Sentirse – to feelrepetir – to repeat Pedir – to ask fordivertirse – to have fun Morir – to die(son)reír – to smile/laugh

Lets conjugate a box D verb!! Dormir What’s missing? Do I change the o-u or e-i and which forms have the change??? uu

Now let’s do another one!! Pedir What’s missing? Change the e-i or o- u and which forms??? ii

It’s a vowel sandwich!!!

The other change that must happen is that accent marks are placed on the “I” if it is the first letter of the ending: Now lets see how the endings work- I Y; and accents on the other “I”s The other change that must happen is that accent marks are placed on the “I” if it is the first letter of the ending: Now lets see how the endings work- I Y; and accents on the other “I”s íí ísteiste yóió ímosimos ísteisisteis

Ca í íste yó ímos ísteis Cre CAER CREER í íste yó ímos ísteis