Ana y mi hermana quieren ir a la biblioteca mañana.

Ana and my sister want to go to the library tomorrow.

Breakdown of Ana y mi hermana quieren ir a la biblioteca mañana.

• querer: to want
• mi: my
• ir: to go
• a: to

Questions & Answers about Ana y mi hermana quieren ir a la biblioteca mañana.

Why is quieren plural?

Because the subject is Ana y mi hermana — two people joined by y (and). In Spanish, that makes the subject plural, so the verb must also be plural.

• Ana quiere = Ana wants
• Mi hermana quiere = My sister wants
• Ana y mi hermana quieren = Ana and my sister want

Why is the verb quieren and not queren?

Because querer is a stem-changing verb. In the present tense, the e in the stem changes to ie in most forms.

So:

• yo quiero
• tú quieres
• él/ella quiere
• nosotros queremos
• vosotros queréis
• ellos/ellas quieren

In this sentence, the subject is plural third person, so you use quieren.

Why do we use ir after quieren?

Because after querer (to want), Spanish normally uses an infinitive when saying what someone wants to do.

So the pattern is:

querer + infinitive

Examples:

• Quiero comer = I want to eat
• Queremos salir = We want to go out
• Ana y mi hermana quieren ir = Ana and my sister want to go

You do not conjugate the second verb here, so it stays as ir, not van.