An infinitive is a phrase or sentence that cannot be tested for tense, number and mood. They are marked by -ing, to +verb, and -ed²/-en verb. Hence, option A Having visited farm.
Infinitives are the basic form of a verb, without an inflection binding it to a particular subject or tense. It takes the form of âto + verbâ in its simplest form. An infinitive expresses an action or state of being.
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