Here are a few ways to express how a certain date or time relates to another:
Previous and Future Time
Here’s how we refer to the past or future:
antes before and depois after
Vou sair antes das 10h. I will leave before 10am.
A loja está fechada depois das 21h. The store is closed after 9pm. Antes and depois are particularly useful when we’re ordering several events by time.
Escovo os dentes depois de jantar e antes de ir dormir. I brush my teeth after having dinner and before going to sleep.
We can also use mais cedo earlier and mais tarde later.
Choosing The Best Way To Express the Past or Future
To check if you’re using the correct word, you can often refer to the literal English translations of these time-related sentences, as they are often similar. (Just don’t tell your Portuguese teacher!)
The first sentence, ending with before, feels incomplete. It raises the question “before what?”. Therefore, the second sentence sounds, and is, correct.