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o que aconteceria se

what would happen if

→ o
phrase Uncommon #18,848
what would happen if Used to ask about a hypothetical consequence. Related forms such as “o que acontece se” and “o que acontecerá se” mean “what happens if” and “what will happen if.”
PO: O que aconteceria se ninguém viesse?
EN: What would happen if nobody came?

O que aconteceria se eu fizesse isso?

What would happen if I did that?

Sabe o que aconteceria se o fisco descobrisse que estou andando de carro novo?

Do you know what would happen if the tax authorities found out I'm driving a new car?

— Prenda-Me se For Capaz (2002)

Talvez devêssemos considerar o que aconteceria se não fizéssemos isso.

Maybe we should consider what would happen if we didn't do this.

O que aconteceria se eu saísse com um livro novo?

What would happen if I went out with a new book?

— Campo dos Sonhos (1989)

O que aconteceria se, mesmo com todos esses elementos, a tempestade acabasse?

What would happen if, despite all these elements, the storm ended?

— Durante a Tormenta (2018)

O que aconteceria se a Caixa de Pandora fosse aberta?

What would happen if Pandora's box were opened?