A structural survey of form – ing (v4).
While writing or reading verb form 4 (ing) comes in different roles, so it is significant to understand. We will understand all v4 different roles today.
Role-1: As a finite, if verb form-4 is followed by helping verb “be” (if helping verb “be” comes before verb form-4). The role of the -ing form is as a main verb. Like:
I am going.
John is playing cricket.
They were watching TV
We were sleeping.
I was waiting for you.
So in the above sentences, going, playing, watching, sleeping, and waiting are verb.
Role-2: As a gerund (non-finite), when a verb form-4 is used as a subject or an object. It is called a gerund. Like:
Walking is good for your health.
She likes dancing.
Smoking is injurious to health
Writing is an exchange of ideas.
I love reading.
In the above sentences, walking, dancing, smoking, writing, and reading are gerund.
Role-3: As an adjective also called present participle (non-finite), when verb form-4 is used as an adjective in a sentence. It is called a present participle. Like:
I saw a playing boy.
I read a piece of interesting news.
The barking dog was calm today.
It was a very tiring day at the workplace.
In the above sentences, playing, interesting, barking, and tiring are adjectives. Since these verbs are saying something about the noun.