INTERROGATIVE, AFFIRMATIVE AND NEGATIVE SENTENCES

The normal structure of sentences in Portuguese does not require an auxiliary, no matter the verb tense or what kind of sentence we are talking about.
Basically, the structure of a sentence is SUBJECT+VERB+COMPLEMENT, and the complement can be a combo of article+noun+adjective and many others, or just one of them.

The main sentence form we know are below. In the table, you will be able to visualize the difference in the structure between English and Portuguese.

INTERROGATIVE SENTENCES:

Different from English, what matters here is the intonation used when speaking. That will define if you are questioning, affirming or denying your statement. See as follows:

AFFIRMATIVE SENTENCES:

In this case, the sentence has the same structure. There is no other sentence term apart from the subject, verb and complement. To emphasize the action, we just use the intonation when speaking the verb. Again, there is no auxiliary to use in such case as in English.

NEGATIVE SENTENCES:

For this kind of sentence, we follow the same pattern as the above ones. No auxiliary is used together with NO. We just place the word NA?O in front of the verb, no matter if it is to be or any other verb.

*It doesn’t matter if the sentence has no shown subject, the NA?O particle still comes before the verb, even in the beginning of the sentences.