Question

Locate the complete infinitive phrase and identify its use.

The children were asked to play quietly.
Infinitive Phrase:
Use:

Answer 1

Infinitive phrase: To play quietly.

Use: Adverb

Step-by-step explanation:

Infinitives are introduced as the non-finite or the basic form of the verb without any articulation linking it to a particular subject. Infinitive phrases are the part of the sentence that includes a group of words with an infinitive. These phrases may function as a verb, adverb or noun. Thus, the phrase that justifies the above claim is "to play quietly" which if functioning as an adverb here.

Answer 2

Infinitive Phrase: to play
Use: Direct object of the verb

"To play" becomes the direct object of the verb "asked", because the unknown subject was asking them to what? To play.
The subject in this passive sentence becomes the children, and the action of 'being asked' is placed upon them, but the infinitive is still the direct object.