Final answer:
To conjugate verbs in Spanish, you need to follow specific rules based on the verb's ending and subject. Stem-changing verbs and regular -ar verbs have different conjugation patterns. In this exercise, you need to conjugate verbs like 'empezar,' 'pensar,' and 'cerrar' with different subjects.
Step-by-step explanation:
To conjugate the verb 'empezar' in the yo form, you need to drop the -ar ending and add -ie. So, the correct form would be 'empiezo'.
The verb 'pensar' is a regular -ar verb, so to conjugate it, you simply drop the -ar ending and add the appropriate endings. The correct form for each subject would be: yo pienso, tú piensas, él/ella piensa, nosotros/nosotras pensamos, vosotros/vosotras pensáis, ellos/ellas piensan, ustedes piensan.
Similarly, the verb 'cerrar' is also a regular -ar verb. The correct forms for each subject would be: yo cierro, tú cierras, él/ella cierra, nosotros/nosotras cerramos, vosotros/vosotras cerráis, ellos/ellas cierran, ustedes cierran.
Learn more about verb conjugation in Spanish