Final answer:
A gerund is an -ing verb that functions as a noun, while a participle is an -ing or -ed verb that functions as an adjective or adverb. An infinitive phrase is an adverb that modifies the main verb. These phrases can be placed in different parts of a sentence and may have objects or modifiers.
Step-by-step explanation:
Gerund Phrase
The gerund is defined as any -ing verb that functions as a noun. In other words, you can place a gerund phrase in any place in the sentence where a noun could normally function. When the gerund verb has an attendant object or modifiers, we describe it as a gerund phrase.
Participial Phrase
A participle is defined as any verb that ends with -ing or -ed (with regular verbs) and functions as either an adjective or adverb. The participle may also have an object (something receiving the action of the verb) after it, causing it to become a participle phrase.
Infinitive Phrase
The infinitive phrase is functioning as an adverb modifying the main verb "bring." Notice that when the infinitive is positioned at the beginning of the sentence and is acting as an adverb (not as the subject), we place a comma after it.
These phrases can be placed in different parts of a sentence and may have objects or modifiers.