Breakdown of Caso o alarme soe, tens de sair do prédio.
do
of the / from the (do, da, dos, das)
o prédio
the building
sair
to go out
ter de
to have to
caso
in case
o alarme
the alarm
soar
to sound
Questions & Answers about Caso o alarme soe, tens de sair do prédio.
Why is the verb soe used here instead of the normal present tense soa?
The word caso (in case) is a conditional conjunction that always triggers the subjunctive mood because it introduces a hypothetical or uncertain situation. We take the verb soar (to sound) and use its present subjunctive form, which is soe.
Could I use se (if) instead of caso (in case) here?
You can, but it changes the grammar! While caso triggers the present subjunctive (soe), the word se requires the future subjunctive when talking about future possibilities. So if you changed the conjunction, you would have to say se o alarme soar (if the alarm sounds).
I always mix up soar (to sound) and suar (to sweat). How do their subjunctive forms compare?
They are very easy to confuse! For the present subjunctive, the "-ar" ending changes to "-e". So, soar becomes soe (in case it sounds), while suar becomes sue (in case he/she sweats).
Why is do needed after sair? Why not just say sair o prédio?
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