Si Clause

Expressing condition

• Use conditional sentences with si clauses to express what could happen if some condition is met
• The si clause expresses the condition and the 2nd clause expresses the result
• Si clauses can come at the beginning or end of sentences
    * ex. Si tengo dinero, iré de vacaciones.
    * ex. Llámame, si puedes.
• Use the indicative mood to refer to real/factual or likely conditions in either the present or the future
• There are several verb tense combinations:

Combinations

Si + present + present

• describes what is true/what happens if a condition is met
    * Si tengo sed, bebo agua
    * Si estudio, saco buenas notas.

Si + present + future

• expresses what will happen if condition is met
    * Si tengo tiempo, iré al gimnasio.

Si + present + command

• gives an order dependent on the condition being met
    * Si me duermo, despiértame.

Si + imperfect subjunctive + conditional tense

• use the imperfect subjunctive in the si clause and the conditional in the 2nd clause to express unlikely, hypothetical, or contrary-to-fact conditions in either the present or the future
• the conditional is never used in the si clause
    * Si yo viajara a Paris, donde me quedaría?