The conditional has no irregular endings. The only irregularity is in the stem, and the good news is that the stems are exactly the same as the irregular future stems. If you already know tendré and saldré, you already know tendría and saldría.
The twelve irregular stems
There are twelve common verbs whose conditional stem is not the plain infinitive. They fall into three small groups based on how they shorten the infinitive.
| Group | Verb | Stem | yo form |
|---|---|---|---|
| Drop the vowel | poder | podr- | podría |
| querer | querr- | querría | |
| saber | sabr- | sabría | |
| haber | habr- | habría | |
| -dr- replacement | tener | tendr- | tendría |
| salir | saldr- | saldría | |
| venir | vendr- | vendría | |
| poner | pondr- | pondría | |
| valer | valdr- | valdría | |
| Short irregular | hacer | har- | haría |
| decir | dir- | diría | |
| caber | cabr- | cabría |
Full conjugation: tener
| Subject | Form |
|---|---|
| yo | tendría |
| tú | tendrías |
| él / ella / usted | tendría |
| nosotros | tendríamos |
| ellos / ellas / ustedes | tendrían |
Full conjugation: hacer
| Subject | Form |
|---|---|
| yo | haría |
| tú | harías |
| él / ella / usted | haría |
| nosotros | haríamos |
| ellos / ellas / ustedes | harían |
Full conjugation: decir
| Subject | Form |
|---|---|
| yo | diría |
| tú | dirías |
| él / ella / usted | diría |
| nosotros | diríamos |
| ellos / ellas / ustedes | dirían |
Examples with other irregular stems
Mañana saldríamos temprano, pero hay mucho tráfico.
Tomorrow we would leave early, but there is a lot of traffic.
¿Podrías pasarme la sal, por favor?
Could you pass me the salt, please?
Ella no sabría qué decir en esa situación.
She wouldn't know what to say in that situation.
Los niños vendrían con nosotros si los dejaras.
The children would come with us if you let them.
Derived verbs
Compounds built on these irregular verbs share the same irregularity. Because poner becomes pondr-, any verb ending in -poner does the same: componer → compondría, proponer → propondría, suponer → supondría. The same logic applies to contener → contendría, mantener → mantendría, detener → detendría, and so on.
Related Topics
- Regular FormationB1 — Form the Spanish conditional by adding -ía endings to the full infinitive of any regular verb.
- Usage: Hypothetical SituationsB1 — Use the conditional to talk about what would happen in imagined or unreal situations.
- Conditional Perfect: FormationB2 — The conditional perfect is formed with the conditional of haber plus a past participle.