Hint: Infinitives can be confused with prepositional phrases e.g. "to run" is an infinitive, "to the store" is a prep.. phrase
As a purpose clause (functions as an adverb, describing the verb) I ran to escape
As a complementary verb (with certain main verbs) We began to run
As an adjective: I made a decision to throw it
As a noun: (subject) (Direct object) To win the game is my goal. I like to play
The following are examples of infinitive clauses fulfilling various functions in a sentence.
Infinitive Clause:
Infinitive clauses are clauses that are based around an infinitive. An infinitive is a verbal idea in the form "to _______". e.g. "to throw," "to catch," etc. An infinitive clause can have a subject, object and modifiers like a main sentence. An infinitive clause may function as a noun, adjective, complementary verb, or a purpose statement.