Participles and Participial Phrases
Participles are verbs written in a certain tense to help modify a point in time. "I had gone," for example, shows the past participle of the verb "to go," where the present participle would be "going," as in, "I am going." All verbs have participle forms, many of which are irregular, or don't follow a set rule. When the verb in its participle form is acting like an adjective, moreover, it is called a participial phrase. The sentence "Going to the beach, I saw Bitsy" begins with a participial phrase, where the participle "Going" modifies the subject, "I". Since it modifies a pronoun (or a noun), it acts like an adjective.