Este pertence é meu.

to be

Breakdown of Este pertence é meu.

• este: this
• meu: my
• o pertence: the personal belonging

Questions & Answers about Este pertence é meu.

Is pertence a verb here?

No. In Este pertence é meu, pertence is a noun, not the verb pertencer.

• o pertence = a belonging, an item, a possession
• pertence = belongs when it is the verb

That is why the sentence also has é. The structure is:

• Este pertence = this item / this belonging
• é meu = is mine

If pertence were a verb, the sentence would have to be different, for example:

• Isto me pertence = this belongs to me
• Isso pertence a mim = this belongs to me

So here, pertence is a thing, not an action.

Is Este pertence é meu a natural sentence in Brazilian Portuguese?

It is grammatically possible, but it sounds a bit formal and somewhat unusual in everyday conversation.

A Brazilian is more likely to say:

• Isso é meu.
• Este objeto é meu.
• Esse item é meu.

The noun pertence exists, but the plural pertences is much more common, especially when talking about personal belongings:

• Onde estão meus pertences? = Where are my belongings?

So the sentence is understandable, but not the most everyday phrasing.