What are infinitive verbs
When the root form of the verb is preceded by the preposition ‘to’, the verb is known as an infinitive verb.
a) Sometimes, the infinitive form of a verb functions as a noun and can become the subject or object of a sentence.
For example: Piyush wants to come home.
You can see here that ‘to come’ (like a noun) is the object of the sentence, but at the same time it also has an object (like a verb), and this object is ‘home’. This is why an infinitive is called a verbal noun, or a noun that has the qualities of a verb.
b) Sometimes, the infinitive form of a verb functions as an adverb.
For example: Neha has gone to see the game.
(Here, the infinitive ‘to see’ is modifying the verb ‘gone’. Hence, it is acting as an adverb.)
The flowers of this plant are good to smell.
(Here, the infinitive ‘to smell’ is modifying the adjective ‘good’. Hence, it is acting as an adverb.)
c) Sometimes, the infinitive form of a verb functions as an adjective.
I have no time to cook food for you.
(Here, the infinitive ‘to cook’ is modifying the noun ‘time’. Hence, it is acting as an adjective.)
Anon-finite verb(sometimes called averbal) is any of severalverbforms that are notfinite verbs; that is, they cannot serve as the root of anindependent clause. The non-finite verb forms found in English areinfinitives,participlesandgerunds; additional such forms found in some other languages includeconverbs,gerundivesandsupines. Non-finite verbs are typically notinflectedfortense, and compared with finite verbs usually display less inflection for othergrammatical categoriesas well.