Breakdown of Hay que cerrar bien la puerta por si acaso.
cerrar
to close
la puerta
the door
uno
one
por si acaso
just in case
Questions & Answers about Hay que cerrar bien la puerta por si acaso.
What does hay que + infinitive mean in this sentence?
Hay que + infinitive is an impersonal structure that means it is necessary to..., one must..., or you have to... in a general sense.
So Hay que cerrar... means something like:
- It’s necessary to close...
- You have to close...
- One must close...
It does not point to a specific person. It is more general than tienes que.
Why is it hay que and not tiene que?
Because hay que is impersonal. It talks about what needs to be done, without saying exactly who must do it.
- Hay que cerrar bien la puerta = The door needs to be closed properly / We should close the door properly
- Tienes que cerrar bien la puerta = You have to close the door properly
So hay que is used when the speaker means something general, like a rule, precaution, or shared obligation.
Why is the next verb cerrar in the infinitive?