Verbs which change meaning when followed by the gerund or infinitive form.

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-9/session-1

We use this form when we talk about something that must be done, but we choose not to say who needs to do it. This is often because the person who needs to do it is unknown, obvious or unimportant.

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-14/session-1

• verb + to-infinitive
• verb + gerund
• verb + that clause

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-10/session-2/activity-3

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-29/session-2/activity-3