This is the 11094th most frequent Portuguese word.
leu
"Leu" is the past tense of "ler," meaning "read" in English.
Here, "leu" is the verb "ler" (to read) in the simple past tense, third person singular, describing a completed action.
Ele já leu aquele livro antigo.
He has already read that old book.
In this sentence, "leu" is in the simple past tense of the verb "ler" and is used in the second person singular formal, indicating a past action being questioned.
Você leu o aviso na porta?
Did you read the notice on the door?
In this case, "leu" is still the simple past form of "ler", third person singular, but it is used in a negative construction with "não" to describe an action not performed in the past.