"Qual é a dúvida" is a series of exercises designed to cover the most confusing aspects of grammatical usage to take learners from an intermediate to an advanced level.

This does not aim to cover all of the complexities of Portuguese grammar, rather concentrating on those grammatical structures that are most commonly employed in daily use on both a formal and informal level.

Very basic notes at the start of each exercise are used to aid the user before commencing and the complete answer key is included at the back of the book.

Adheres to levels B1, B2 and C1 of the CEFR.