conjugation
regular verbs
exercises: conjugation of tomar
exercises: conjugation of recibir
exercises: conjugation of comer

important irregular verbs
exercises: conjugation of estar
exercises: conjugation of ser
exercises: conjugation of poder
exercises: conjugation of ir
exercises: conjugation of querer
exercises: conjugation of saber

more irregular verbs
exercises: conjugation of pagar
exercises: conjugation of pensar
exercises: conjugation of salir
exercises: conjugation of sentir
exercises: conjugation of conocer

demonstrative pronouns
exercises: mit este, esta, esto, estos, estas
                mit ese, esa, eso, esos, esas
                mit aquel, aquella, aquello, aquellos, aquellos

possessive pronouns
exercises: substantival and adjectival

compound tenses
exercises: pretérito perfecto und pretérito plusquamperfecto

subjuntivo
exercises: presente de subjuntivo
                pretérito imperfecto de subjuntivo
                pretérito perfecto de subjuntivo

condicional
exercises: condicional simple
                condicional compuesto

interrogative pronouns
exercises: quién, quiénes
                cual(es)
                qué / quién

adverbs & comparative
exercises: comparison with superiority
                comparison with equality
                comparison with subordination

imperative
exercises: to do or not to do - giving orders

date & time
exercises: date & time

numerals
exercises: numerals