Question

Which one of the following statements is true for the base forms of verbs?

A. When the subject of a sentence is singular, add "_s" to the base form.
B. Add "_ed" to irregular base forms to form the past participle.
C. Add "to" to the base form to create an adjective.
D. Do not use a base form with plural subjects.

Answer 1

not quite sure but i think c

Answer 2

The correct answer is A. When the subject of a sentence is singular, add "_s" to the base form.

An easy example is "to exist", the base form is "exist" and A strawberry exists shows that you add s when a singular subject is used.