In the following sentence, what kind of phrase is " to play basketball"?

Question

"Porpoises have been to play basketball."

Answer 1

We'll be glad to check your answer.

Answer 2

participal

Answer 3

Please check for me.

Answer 4

Is this right Kevin?

Answer 5

Pretty sure its an infinitive. Usually infinitives are phrases such as "to eat," "to laugh," etc. just look up the definition