Example 1
Henry wants to attend a lecture about trout fishing at the university on Friday night.
In this example, to attend is an infinitive verb made by adding to to the base verb attend. Good luck finding a date, Hank.
Example 2
Gayle has a plan to visit all fifty states before she turns 30.
Here, to plus visit creates the infinitive verb to visit. Since Gayle is 28 and has never left Agawam, Massachusetts, she better get moving.
Example 3
Brent's mom asked him to stop drinking orange juice straight from the carton.
In this case, to stop is an infinitive verb that consists of to plus the base verb stop. We're with Brent's mom on this one. Brent is being nasty.