Regular -IR Conjugation

The -IR verb group is the third and final family of regular verbs in Spanish. While it is the smallest group, it contains many important everyday verbs. The great news is that -IR conjugation is almost identical to -ER conjugation, with only two forms being different.

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How -IR Conjugation Works

1. Remove the -ir ending from the infinitive
2. Add the appropriate present tense ending for the subject

For example, with the verb vivir (to live):

• Infinitive: vivir
• Stem: viv-
• Conjugated: yo vivo, tu vives, etc.

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The -IR Present Tense Endings

Subject Pronoun	Ending	Example with vivir	Translation
yo	-o	vivo	I live
tu	-es	vives	you live
el / ella / usted	-e	vive	he/she lives, you (formal) live
nosotros / nosotras	-imos	vivimos	we live
vosotros / vosotras	-is	vivis	you all live
ellos / ellas / ustedes	-en	viven	they live, you all (formal) live

Tip: The -IR endings are identical to -ER endings in four out of six forms. The only differences are nosotros (-imos instead of -emos) and vosotros (-is instead of -eis).

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-ER vs -IR: Spot the Difference

Subject	-ER Ending	-IR Ending	Different?
yo	-o	-o	No
tu	-es	-es	No
el/ella/usted	-e	-e	No
nosotros/as	-emos	-imos	Yes
vosotros/as	-eis	-is	Yes
ellos/ellas/ustedes	-en	-en	No

This means that if you already know -ER conjugation, you only need to memorise two new endings for -IR verbs.

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Common Regular -IR Verbs