Spanish conditionals connect a condition with its result. The most important question is not which numbered conditional you remember, but whether the condition is presented as real, hypothetical now, or impossible because the past is already fixed.
Spanish conditionals at a glance
| Meaning | Si clause | Typical result | Example |
|---|---|---|---|
| Real or open | si + present | present, future, or command | Si tengo tiempo, iré. |
| Hypothetical now/later | si + imperfect subjunctive | conditional | Si tuviera tiempo, iría. |
| Unreal past | si + past perfect subjunctive | conditional perfect | Si hubiera tenido tiempo, habría ido. |
| Mixed time | past or present unreal frame | result in another time | Si hubiera estudiado, tendría trabajo. |
Do not place the present conditional directly after si in these standard patterns.
Move from an open possibility to a hypothetical situation
Si tengo tiempo, voy describes a repeatable reality; si tengo tiempo, iré leaves a future result open. Si tuviera tiempo, iría deliberately steps away from reality. The imperfect subjunctive marks the hypothetical condition, and the conditional gives its imagined result.
Si puedo, te ayudo. Si pudiera, te ayudaría.Quick check
Choose the hypothetical sentence.
Use third and mixed conditionals for an unreal past
A third conditional imagines a different past and its past consequence. A mixed conditional keeps the unreal past condition but moves the result into the present, or starts with a present unreal state and explains a past consequence. The tense change is meaningful because the two clauses point to different times.
Si hubiéramos reservado, habríamos entrado. Si hubiéramos reservado, ahora tendríamos mesa.Quick check
Which sentence links an unreal past condition to a present result?
Common mistakes with Spanish si clauses
Si tendré tiempo, iré.
Si tengo tiempo, iré.
An open future condition normally uses the present indicative after si.
Si tendría tiempo, iría.
Si tuviera tiempo, iría.
A hypothetical si clause uses the imperfect subjunctive, not the conditional.
Si habría llamado, habría venido.
Si hubiera llamado, habría venido.
An unreal past condition uses the past perfect subjunctive after si.
Spanish conditionals FAQ
How many Spanish conditionals are there?
Learners commonly group them as real or zero/first, second, third, and mixed conditionals. The useful distinction is the reality and time relationship expressed by the clauses.
Can I use the future tense after si?
Not normally in an open condition. Spanish usually uses the present indicative after si and places the future in the result clause.
Can I use the conditional after si?
Not in the standard hypothetical patterns. Use the imperfect subjunctive or past perfect subjunctive in the si clause.
What is the Spanish third conditional?
It combines si plus the past perfect subjunctive with the conditional perfect to imagine a past that did not happen and its unreal result.
What makes a conditional mixed?
The condition and result refer to different times, such as an unreal past choice with a present consequence.
Can the result clause come first?
Yes. Habría ido si hubiera podido means the same basic relationship as Si hubiera podido, habría ido. A comma is generally unnecessary when the si clause comes second.
Related conditional and tense lessons
Spanish conditionals become predictable when reality and time come first. Decide whether the condition is open, hypothetical now, unreal in the past, or connected to a result in another time. The verb forms then express that decision instead of acting like a memorized formula.