the second verb must be either an infinitive with 'to' such as 'to do', 'to make', 'to go' etc. or an -ing form such as 'doing', 'making', 'going'. In this episode of The Flatmates, the police ...

In sentence B, the first verb is followed by a gerund (-ing) form. The verb patterns are dependent upon the first verb. Sometimes, if a verb has two patterns, each pattern can have a different ...