Interjections are words with an emotive function. They are used to express emotions, sensations, and moods. They can be just simple vowel sounds, like Ah! and Oh! , but most are either a free word or a phrase, in which case we call them locuções interjetivas.
The same interjeição interjection can have different meanings depending on the context in which it appears, its purpose, and the speaker’s attitude. Even with simple vowel sounds, sometimes changing the tone and extending the sound will give it another meaning.
Ai! Bati com o joelho na mesa. Ah! I hit the table with my knee.
Ai! Já me estou a passar contigo. Ah! You're getting on my nerves.
Interjections can be used as a standalone reply / affirmation, or they can be followed by a sentence.
Irra! Vocês não conseguem mesmo estar calados, pois não? Geez! You really can't keep quiet, can you?
There’s practically an unlimited number of interjeições interjections, but below you will find the most common grouped by meaning/context.
Happy / Compliments
Vamos! Let's go! Força! Go for it!, Stay strong! Vai! Go! Bora! Let's go! Siga! Go! Coragem! Courage! Anda! Come on! Boa! Nice! Bem! Good! Apoiado! I support you! Bravo! Congratulations! Parabéns! Congratulations! Continua! Go on! Dá-lhe!
Desires / Wishes
Impatience / Frustration
Greetings / Saying goodbye
Horror / Fear
Doubts / Questions
Pain / Sadness
Many of the expressions shown above can be combined with each other, often following the simple vowel sounds + a free word structure.
Another way to use interjeições is to combine them with other words such as adverbs and pronouns.
Also, you may have noticed that some expressions already have pronouns, like Quem me dera! I wish! for example. You can change the pronoun to te or nos and have the interjection reference other people, as in Quem te dera! You wish!