The type of verb that typically includes the word “to” is an infinitive verb.
Explanation
An infinitive form of a verb is always used with a “to” before it.
The verb may perform the function of a noun, adjective or adverb.
The verb is present in its basic form ie. the verb will not end with –ed, -ing or –s.
In bare infinitives, the word “to” is not used.
Infinitives can be found in a different place in the same sentence and may serve different functions.
For example- To play.