Answer:
<em>To win</em>
In this sentence it is used as a subject noun i.e.<em> "To win the poetry contest" </em>is acting as a subject noun.
Explanation:
Verbal is a word made from a verb and used as something else in a sentence. e.g. gerund, participle adjective etc.
Infinitive: An infinitive is a type of verbal that can function as a noun, adjective or a verb.
Uses of Infinitive:
Infinitive can function;
As Noun (subject or object) e.g.
He likes <em>to swim </em>(as object).
To win the poetry contest would be exciting (as subject).
As Adjective e.g.
He had some work to do (modifies and explains work).
A good novel to read is War and Peace (modifies novel).
As Adverb e.g.
He worked hard to succeed in the examinations (tells why he worked hard).
