"That is a pen."

Translation: Aquilo é uma caneta.

[cloudhorizon]

One of the correct translations is "Isso é uma caneta" Is that really correct? I thought isso could only be used when the subject is not mentioned or said specifically.
Also, why can I not use "Essa é uma caneta?"

[Paulenrique]

Isso é uma caneta is correct as well. You have been looking at a strange thing and ask yourself: "what is that?" You go there, pick that thing and say:"isso é uma caneta" :)

[BenHueb]

Why not "aquila"? Shouldn't the genders match?

[Paulenrique]

"Aquila" does not exist. The correct word is "Aquela".

[BenHueb]

Oops, that's what I meant! So, are you correcting just me or Duo's answer here and me?

[Paulenrique]

hahahaha..."Aquela é uma caneta" is also right, but I think I'd use "Aquilo..." anyway. It's used more often to explain what an object is.

[Hector290697]

So is "aquilo" used for objects regardless of their genders?

[Paulenrique]

Yes, "isto", "isso", and "aquilo" are neutral.