The Spanish conditional tense is formed much like the Spanish simple future tense. Both regular and irregular verbs use the same set of endings, and any stems that are irregular in the simple future are also irregular in the conditional.

Regular Conditional Forms

To form the conditional tense with regular -ar verbs, regular -er verbs, and regular -ir verbs, simply add the conditional endings to the end of the infinitive. Below you'll find a table with the Spanish conditional endings, as well as conjugations of three regular verbs in the conditional: viajar, conocer, and escribir.

Spanish Conditional Endings

Conditional Conjugations of Viajar, Conocer, and Escribir

Check out these examples of the regular conditional.

Irregular Conditional Forms

The conditional has relatively few irregular verbs. They fall into three categories:

1. Verbs where the last vowel in the infinitive is replaced with a -d
2. Verbs where the last vowel in the infinitive is removed
3. Verbs that are just plain irregular

1. Verbs Where the Last Vowel in the Infinitive Is Replaced with a -d

Only -er and -ir verbs fall into this category. To form the stem of these verbs, simply replace the e or i at the end of the infinitive with a -d. Then, add the conditional endings.

A good example of this type of verb is tener (to have). Check out the conditional conjugation of this verb below.

Tener Conditional Conjugation

Other Verbs like Tener

2. Verbs Where the Last Vowel in the Infinitive Is Removed

Only -er verbs fall into this category. To form the stem of these verbs, remove the vowel from the infinitive ending. Then, add the conditional endings.

A good example of this type of verb is poder (to be able to). Check out the conditional conjugation of this verb below.

Poder Conditional Conjugation

Other Verbs like Poder

3. Irregular Stems

The verbs decir (to say) and hacer (to do/make) have slightly more drastic stem changes that don't fit into either of the above patterns. Check out the conditional conjugations of these two verbs below.

Decir and Hacer Conditional Conjugations