Feche a porta com cuidado.

Close the door carefully.

Breakdown of Feche a porta com cuidado.

• a porta: the door
• fechar: to close
• com cuidado: carefully

Questions & Answers about Feche a porta com cuidado.

Why is it feche and not fecha?

Feche is the imperative form used for você in Brazilian Portuguese.

The verb is fechar = to close.
For commands with você, Portuguese often uses the same form as the present subjunctive:

• que você feche = that you close
• feche! = close!

So Feche a porta means Close the door when speaking to você.

By contrast:

• fecha is usually the tu command in many varieties: Fecha a porta.
• In Brazil, many people use você much more often than tu, so feche is very common.

Is this command formal?

Usually, yes—or at least neutral/polite.

Because it uses the você command form, Feche a porta com cuidado sounds appropriate in many everyday situations. It is not extremely formal, but it is more polite or standard-sounding than some very casual alternatives.

Compare:

• Fecha a porta com cuidado. → more associated with tu or a more casual tone in some regions
• Feche a porta com cuidado, por favor. → more polite
• Fecha a porta aí. → much more casual

So feche is a safe form for learners to recognize and use.