present: ie

Stem-Changing Verbs: The (e → ie) Pattern

In Spanish, stem-changing verbs differ from regular verbs because the vowel in the main part of the word (the stem) changes when you conjugate it. This change happens whenever the stress of the voice falls on that stem.

When does the change happen?

Because the change is driven by stress, it follows a specific pattern (often called "boot verbs"):

• The change occurs in all singular forms: yo (I), tú (you), él/ella/usted (he/she/you formal).
• The change occurs in the third-person plural: ellos/ellas/ustedes (they/you all).
• The change does NOT occur in nosotros (we) or vosotros (you all, Spain), because the stress falls on the ending, not the stem.

Group 1: The (e → ie) Change

Textbooks often mark these verbs with a note like (e → ie) after the infinitive. This means the e in the stem turns into ie.

Here is how the verb cerrar (to close) works:

Here is an example with an -er verb, querer (to want):

Common Verbs in This Group

Many common verbs follow this pattern. It applies to simple actions, reflexive verbs, and even impersonal weather verbs.

• -ar Verbs: empezar (to start), comenzar (to commence), pensar (to think), fregar (to scrub/wash dishes), negar (to deny), recomendar (to recommend), acertar (to get right), encerrar (to lock up), tropezar (to stumble).
• -er Verbs: entender (to understand), perder (to lose), defender (to defend), encender (to turn on/light).
• Reflexive Verbs: sentarse (to sit down), despertarse (to wake up). Example: Me diesperto (I wake up).
• Weather Verbs: helar (to freeze) and nevar (to snow). These are only used in the third-person singular: hiela (it freezes), nieva (it snows).