These are the three parts of speech that an infinitive can be.
What are the "noun, adjective, and adverb"?
This the definition of a dangling participle.
What is a modifier that doesn't clearly modify a noun or pronoun?
These two letter word is a preposition when it isn't at the beginning of an infinitive.
What is "to"?
It is the definition of a participle phrase.
What is "a participle and any of its complements and modifiers"?
The part of speech of the infinitives in this sentence: To be or not to be is the question.
What are "nouns"?
It is the participle in this sentence: Singing in the rain requires getting wet.
What is "getting"?
The part of speech of the infinitive in this sentence: I flew to Vegas to save money.
What is an "adverb"?
It is the participle in this sentence: The unexamined life is a waste.
What "waste"?
The part of speech of the infinitive in this sentence: I went took the train to Los Angeles to visit The Hollywood Bowl.
What is an "adverb"?
It is the participle in this sentence: Reasoning requires spoken words.
What is "spoken"?