gerund

Certain verbs when followed by another verb - for example 'enjoy doing'. 

The following verb can take the gerund, infinitive or base form of the verb. 

The gerund refers to the 'ing' form of the verb for example, playing, doing, singing, etc. 

The infinitive refers to 'to + verb' for example, to think, to say, to eat, to design, etc. 

The base form of the verb is only the verb for example, drive, follow, cook, join, etc.