How is the -ing form used in the following sentence?
To get in shape for that marathon, Shelby started running around the block a few times each morning.
-participial phrase as an adjective
-participial phrase as a noun
-participle as an adjective
-participle as a noun
-gerund phrase as a subject
-gerund phrase as a predicate noun
-gerund phrase as direct object
-none of these
