Breakdown of Cuando hace calor, abro la ventana y enciendo el ventilador.
yo
I
abrir
to open
la ventana
the window
y
and
Questions & Answers about Cuando hace calor, abro la ventana y enciendo el ventilador.
Why is it hace calor and not está caliente?
Why doesn’t cuando have an accent here?
Cuando (no accent) is a conjunction meaning “when.”
Cuándo (with accent) is used only in direct/indirect questions or exclamations (e.g., ¿Cuándo vienes?, No sé cuándo vienes). In this sentence it’s a plain “when,” so no accent.
Who/what is the subject of hace in hace calor?
It’s an impersonal expression: there is no explicit subject (no “it”). Spanish often uses third person singular for weather with hacer: hace calor, hace sol, etc.
Why is there a comma after the first clause?
When an adverbial clause like Cuando hace calor comes first, Spanish typically uses a comma before the main clause: …, abro la ventana…. If you put the “cuando” clause after the main clause, you usually omit the comma: Abro la ventana cuando hace calor.