Mandatos formales 1.Formation of Regular Informal Affirmative Commands Unlike Ud./Uds. commands and the negative tú commands, most affirmative tú commands have the same form as the third person singular (Ud.) form of the present indicative.* Stem changes occur, but there are no changes for verbs ending in -car/-gar/-zar. 2. Irregular Informal Affirmative Commands Some verbs have irregular affirmative tú command forms. Summary of Informal Commands NEGATIVE: -ar → -es -er/-ir → -as AFFIRMATIVE: -ar → -a -er/-ir → -e AFFIRMATIVE: command + pronoun (1 word) NEGATIVE: no + pronoun + command (3words) Mandatos informales 1.Regular Verbs Most formal command forms can be derived from the yo form of the present tense. Note that the “opposite” vowel is used: -ar → e -er/-ir → a 2.Stem-changing Verbs Formal commands for stem-changing verbs will show the stem change, since the stem vowel is stressed. Base the command on the yo form to get the stem change right. 3. Verbs Ending in -car, -gar, -zar Summary of Formal Commands Affirmative: command +pronoun (1 word) Negative: no + pronoun+ command (3 words) -ar → -e(n) -er/-ir → -a(n)