Answer :
To do a tough job well can be rewarding.
The phrase To do a tough job is an infinitive.
What are Gerunds, infinitives, and participles?
A gerund is a word with a "ing" ending that functions as a noun. The "-ing" suffix transforms a verb so that the whole word now functions as a noun.
A verb's basic form gains the word "to" to make an infinitive, which can subsequently be used as a verbal noun, adjective, or adverb.
A participle is a verb that serves as an adjective and has one of the following endings, depending on the root word: "-ing," "-ed," "-en," "-d," "-t," "-n," or "-ne."
When a participle is paired with one or more nouns or pronouns, a participial phrase, or group of words, is produced.
The phrase To do a tough job is an infinitive.
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