At first glance, ao looks like a simple contraction (a + o). That’s a preposition of movement and you see it in phrases like vou ao supermercado or fui ao cinema.
But in this lesson, we’re talking about a different use of ao — one that helps you say when something happens. In this case, ao is followed by a verb in the infinitive form and means something like “as,” “when,” or “upon” in English.
Let’s look at a few examples:
- Hoje de manhã a Joana sentiu uma dor nas costas ao levantar-se.
- This morning Joana felt pain in her back as she got up.
- Ao sair de casa, dei conta de que me esqueci das chaves do carro na cozinha.
- As I was leaving the house, I realized I’d forgotten the car keys in the kitchen.
Why It’s Useful
This structure with ao + infinitive is very common in everyday Portuguese. It helps you sound more natural when describing two actions that happen at the same time — one main action and another that sets the scene.
You’ll often hear it in spoken Portuguese, short stories, and even instructions or recipes (Ao abrir a embalagem, mexa bem — “When you open the package, stir well”).
Tiny word, big help. Master this use of ao and you’ll sound instantly more fluent in Portuguese.
Até já, p
