I noticed that the online course in the learning studio gives “Eu sou a Ana” as an example. However, the Portuguese textbook that I use, Colloquial Portuguese, never mandates the use of the article in the “Eu sou…” construction. Which is correct? Thanks in advance.
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Welcome, @franzmallalieu! I’m glad you asked this question! I have a great deal of trouble knowing when to add the initial article or when to leave it out! This is one of the most confusing things, for me, in Portuguese. I am looking forward to learning about this, also! 
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Sure, it is grammatical to say “Eu sou o Franz”. It can be argued that the definite article is redundant, but we definitely prefer to keep it there 
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Thank you Joseph. I have run into the same thing. Not just with a NAME, but with other nouns as well. I think it best, then, to leave the article there.
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