In English when two verbs come side by side ‘to’ is placed between them or ‘ing’ is added to second verb.
If there is ‘to’ between two verbs, we call it INFINITIVE and ‘ing’ added to second verb it is called GERUND.
Infinitives and gerunds take the place of a noun in a sentence.
Following lists and pdf file will help you figure out whether an infinitive or gerund is needed.
Download gerund and infinitive lists down below.