Usages of por si acaso
Cierra la puerta antes de que empiece la lluvia, por si acaso.
Close the door before the rain starts, just in case.
Quedamos delante del restaurante por si acaso alguien se pierde.
We meet in front of the restaurant just in case someone gets lost.
Ahora la bombilla nueva funciona bien y dejamos la linterna junto al interruptor por si acaso.
Now the new light bulb works well and we leave the flashlight next to the switch just in case.
Traigo la fotocopia y también otra fotocopia por si acaso.
I bring the photocopy and also another photocopy just in case.
Si llegas con retraso, envíame un mensaje, por si acaso.
If you arrive late, send me a message, just in case.
Guardo la cartera debajo de la almohada por si acaso.
I keep the wallet under the pillow just in case.
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