Can can be use as third person?

You're asking about the word "can" and its use in the third person. Here's the breakdown:

* "Can" is a modal verb. Modal verbs like "can," "could," "may," "might," "will," "would," "shall," "should," and "must" are special verbs that modify other verbs. They express things like ability, permission, possibility, obligation, etc.

* Modal verbs don't change form for different persons. This means "can" remains the same whether you're talking about the first person (I, we), second person (you), or third person (he, she, it, they).

Examples:

* First Person: I can play the piano.

* Second Person: You can go to the park.

* Third Person: He can swim very well.

Therefore, "can" can be used in the third person without any changes.