Please give me an envelope.
Por favor, dê-me um envelope.
The letter is inside the envelope.
A carta está dentro do envelope.
Tom sealed the envelope.
Tom selou o envelope.
I need an envelope.
Preciso de um envelope.
I've written his address on the back of the envelope.
Escrevi o endereço dele no verso do envelope.
He opened the envelope only to be disappointed.
Ele abriu o envelope apenas para ficar desapontado.
He cut the envelope open.
Ele abriu o envelope.