Cerrar: ustedes cierran. dormir: mi abuela no duerme. cerrar (e: ie) question 1 with 1 blanktú . question 2 with 1 blanknosotras . question 3 with 1 blankmi hermano . question 4 with 1 blankyo . question 5 with 1 blankusted . question 6 with 1 blanklos chicos . question 7 with 1 blankella . dormir (o: ue) question 8 with 1 blankyo no . question 9 with 1 blanktú no . question 10 with 1 blankmis hijos no . question 11 with 1 blankusted no . question 12 with 1 blanknosotros no . question 13 with 1 blankél no . question 14 with 1 blankustedes no .

cerrar (e:ie)  

1Tú cierras

2. Nosotras cerramos

3. Mi hermano cierra

4. Yo cierro

5. Usted cierra

6. Los chicos cierran

7. Ella cierra.

dormir (o:ue)  

8. Yo no duermo

9. Tú no duermes.

10. Mis hijos no duermen.  

11. Usted no duerme.

12. Nosotros no dormimos.  

13. Él no duerme.  

14. Ustedes no duermen.

Explanation:

In Spanish, irregular verbs are those that when conjugated alter their lexeme, gramema, or both parts at the same time, omitting the natural modification that would correspond to them according to the mode and time.

To recognize whether a verb is regular or irregular, it must be combined according to the model verbs (amar, temer y partir) in the present tense, past perfect simple and future. If the sound with which we pronounce the root changes or the disinseences change, it is an irregular verb.

In a flexive language, an irregular verb is a verb that has particular or idiosyncratic conjugations according to the time or mode in which it is conjugated.