Question

Choose the sentence that correctly combines the sentences or sentence elements by changing the italicized clause to an infinitive. Indicate whether the infinitive phrase is used as a noun, an adjective, or an adverb. Don't put your elbows on the table. It is bad manners. The infinitive is used as a(n)

Answer 1

It is bad manners if you put your elbows on the table.

The infinitive is used as a (noun)

Answer 2

1. To put your elbows on the table is bad manner.
2. The underlined structure is a to -infinitive phrase. The to infinitive is functioning as a noun.

Step-by-step explanation:

1. Don't put your elbows on the table is a finite-clause; this means that the main verb to put is conjugated. The omitted you is the person that agrees with (You) don't put. The finite clause can be turned into a non-finite clause ; this can be realised through an infinitive . This non-finite clause can function as the subject of a sentence.
2. To put... is a noun because the whole structure equals to: This is bad manner. So, What is this?; To put your elbows...