Add ing. Adding -ing will turn the verb into the present participle. The base form of a verb is often called present. eg listen. But if the subject of the verb is he, she or it then the present form...
The word 'change' is a noun and a verb (change, changes, changing, changed). Examples: Noun: The change in procedure has been very helpful.Verb: I will change the light bulb in the hallway.