When one verb follows another, the first verb determines the form of the second verb, which can be a gerund, infinitive, or base form. A gerund is a verb form ending in "-ing" that can be used as a noun. Certain verbs such as "enjoy", "suggest", and "feel like" take a gerund as the second verb, while other verbs such as "want" and "like" take an infinitive without "to" as the second verb. Prepositions can also affect whether the second verb is a gerund or infinitive.