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Verbals
A verbal is a word that is made from a verb, has the power of a verb, but acts as another part of speech. Gerunds, participles, and infinitives are verbals.
543.1 Gerund
A gerund is a verb form that ends in -ing and is used as a noun.
Exercising is important.
(The gerund exercising is the subject.)
My grandfather “blames” exercising for his good health.
(The gerund exercising is the direct object.)