Because "É uma mulher" is different (in Portuguese, at least) from "Ela é uma mulher".

"É uma mulher" = "It is a woman" /////// "Ela é uma mulher" = "She is a woman"

"É um menino" = "It is a boy" //////// "Ele é um menino" = He is a boy".

I think I know where your confusion is coming from. You are assuming that "É uma mulher" is the same as "Ela é uma mulher" and you are just omitting "Ela" without changing the meaning of the sentence. Thing is, when you omit "Ela", you do change the meaning of the sentence.

"É uma mulher" or "É um menino" is used when you just realized that the person is a woman or a boy.

Like when a survivor of a shipwreck shows up on the beach and you see that shape from a long distance. You come closer to it and then you realize that it is a woman, or a boy. In Portuguese you say "É uma mulher!" ("It is a woman!")/ "É um menino!" ("It is a boy!") and not "Ela é uma mulher!" ("She is a woman!") / "Ele é um menino!" ("He is a boy!").

yeah, and the "eh" is pronounced sharply. that's why it has an accent over it. it's stressed.

um menino = a boy o menino = the boy

yeah i put "he is a lad" and marked it right.

They have the same translation - a/an. But they are used differently.

In Portuguese, words have a gender. "um" is the masculine indefinite article and "uma" is the feminine indefinite article.

You use "um" before masculine nouns, and "uma" before feminine ones.

Um menino = A boy

Uma menina = A girl

Um livro = A book

Uma mesa = A table

NO. Girl = garota. Most feminine words end with the letter "A".

I wish up and down votes weren't anonymous. What sort of twerp votes a simple question down?

I agree. Having to do everything again (over and over) with the new Crowns system and the fast voice sounds like, "ele ammenino" to me (or even "ele almenino" like she is about to break out into the alphabet...)

"she" is "ela"

She is a girl = Ela é uma menina

He is a boy = Ele é um menino