Spanish Preterit 70 AR/ER/IR Regular Verb Conjugations Worksheet - Students conjugate 70 regular -ar, -er and -ir verbs. The verb is provided and students must conjugate it based on the subject. Sample verbs included are caminar, nadar, escribir, cantar, abrir, correr, aprender, comer, vivir, hablar and bailar. Each verb listed is used several times with different subjects to give students plenty of practice with the different conjugations. Both sets of preterit verb endings are provided for student reference. The answer key is included.