1- The best plumber to call is Mr. Jones. (Adjectival)
2-Henry brought Jeri a ring to show his love. (adverbial)
3-Each year Merriweather tried to find more deductions for his tax return. (noun)
4- To patch the hole, the mechanic inserted a plug. (Adverbial)
5- She learned to read and write English in Kenya. (noun)
6- Eric’s desire to do everything perfectly will eventually frustrate him. (Adjective)
7- To pay that much money for a television is foolish. (noun)
8- Yesterday Smith exercised all day to lose some weight before the wedding. (adverbial)
9- His only ambition was to succeed at his job. (noun)
10- To attempt an explanation for this phenomenon would do little good. (noun)
Explanation:
An infinitive is a verb form that has complements and modifiers. It has the form "to+ verb" and can function as a noun, adjective, or adverb, depending on the structure and form of the sentence.
The infinitive or infinitive phrases of the given sentences and their functions are as follows-
1- The best plumber to call is Mr. Jones. (Adjectival)
2-Henry brought Jeri a ring to show his love. (adverbial)
3-Each year Merriweather tried to find more deductions for his tax return. (noun)
4- To patch the hole, the mechanic inserted a plug. (Adverbial)
5- She learned to read and write English in Kenya. (noun)
6- Eric’s desire to do everything perfectly will eventually frustrate him. (Adjective)
7- To pay that much money for a television is foolish. (noun)
8- Yesterday Smith exercised all day to lose some weight before the wedding. (adverbial)
9- His only ambition was to succeed at his job. (noun)
10- To attempt an explanation for this phenomenon would do little good. (noun)