Final answer:
The words listed are action verbs, which describe actions taken by subjects of sentences. They represent different forms, such as progressive tense or gerunds used as nouns.
Step-by-step explanation:
The verbs and verb phrases in the sentences you provided are as follows:
- a) worried, clapping, stumbled
- b) announced, swirled, settled
- c) rolled, laughed, pictured
- d) leaving, play, skip
All these words are action verbs, representing an action taken by the subject of a sentence. Some are in different forms; for example, 'worried' is often used to describe a state of being, whereas 'clapping' can be part of a progressive tense ('is clapping') or a gerund used as a noun.