A noun formed from a verb by adding ‘ing’
Eg: Swimming is good for health
Here, the term swimming framed as a noun by add ‘ing’ to the verb swim
It is partly a verb and partly an adjective. It is a verbal adjective.
The formed by adding ‘ing’, ‘ed’, ‘en’ to verbs.
Eg: The wounded soldiers were taken home.
It is used as a noun to function as a subject or object in sentences. It formed when ‘to’ comes before a verb.
It is formed by adding ‘to + verb’ for.
Eg: He wanted to buy a car.
Note: After model auxiliaries like, shall, will, should, would, may, might, must, can, could, We can use infinitive without ‘to’.
Eg: With ‘to’: He knows how to sing.
Without ‘to’: He can sing.