1 Stem-changing verbs AKA Boot verbs

2 -The infinitive is the basic, unconjugated form of a verb, sometimes called the name of the verb. -In English the infinitive is to + verb: to begin, to want, to prefer, etc.

3 The Spanish infinitive is a single word with one of the following endings: -ar, -er, or -ir: empezar, querer, preferir We usually learn Spanish verbs in the infinitive, since that is what you start with in order to conjugate them.

4 Verbs have two parts the ending and the stem

5 The ending is the last two letters of a verb in infinitive. It should be -ar -er or -ir Querer empezar Preferir

6 ending The stem is what is left after dropping the ending (last two letters of the infinitive) empez ar stem

7 quer er stem prefer ir stem

8 The last vowel of the stem will change. In this type of stem changing verb e will change to ie quere er

9 Verbs that change e→ie

10 D quieroYo quere Nosotros Túquieres Vosotros quer éis Él Ella quiere Ellos Ellas quieren Ud.quie re Uds.quieren mos Querer

11 D pref ieroYo preferi Nosotros Túprefieres Vosotros prefer ís Él Ella prefiere Ellos Ellas prefieren Ud.prefie re Uds.prefieren mos Preferir

12 D emp ie z oYo empeza Nosotros Túempiezas Vosotros empez áis Él Ella empieza Ellos Ellas empiezan Ud.empie za Uds.empiezan mos Empezar