"To be" is a two word verb form called an infinitive.
The phrase "to be" is an infinitive verb phrase in English.
"Of the field" is a prepositional phrase. The word "of" is a preposition, and "the field" is the object of the preposition.
"To them" is a prepositional phrase, where "to" is a preposition and "them" is a pronoun.
The phrase "what part of speech is cake" is a question.
"That" is a pronoun, while "I" is a pronoun and "am" is a verb.
If "get along with" is considered a small enough number of words to have a part of speech as a phrase, it is a verb.
A phrase is never a part of speech, only a word.
Prepositional phrase
"Of the field" is a prepositional phrase. The word "of" is a preposition, and "the field" is the object of the preposition.
The phrase "in addition" is a prepositional phrase in which "in" is the preposition and "addition" is its object. This phrase, as a phrase, is not a part of speech, although it may function as one, probably an adjective or adverb.
A prepositional phrase.
On the mountain top is a preposition phrase, not a part of speech.
That I am is a phrase, the individual words in the phrase are parts of speech. That -- demonstrative, determiner I -- pronoun am -- be verb
"That" is a pronoun, while "I" is a pronoun and "am" is a verb.
A phrase is a group of words that functions as a unit in a sentence but does not contain a subject and a verb. It can act as a noun, adjective, or adverb within a sentence.
adverb phrase
verb
A prepositional phrase.