Questions & Answers about Sei que moras aqui.
Where are the words for "I" and "you" in this sentence?
In Portuguese, you can usually drop the subject pronouns like eu (I) and tu (you) because the verb endings already tell us who is doing the action. Sei means "I know" and moras means "you live" (informal). Adding eu and tu would sound unnatural here unless you really wanted to emphasize who is doing the action.
Why is the word que in the sentence if the English translation doesn't use "that"?
In English, we often skip the word "that" in sentences like "I know (that) you live here." In Portuguese, you cannot skip the conjunction que. You must always include it to connect the two parts of the sentence.
Why use sei instead of conheço for "I know"?
Could I say vives instead of moras?