Which sentence uses the correct form of the verb speak? a. she has always speak so highly of her coaches. b. she has always speaks so highly of her coaches. c. she has always spoken so highly of her coaches. d. she has always spoke so highly of her coaches.

modal adverbs are used to modify specific verbs that consist of a linking verb (verb of being) and sometimes another verb. examples of modal verbs include can, could, may, might, must, shall, should, will and would.

modal auxiliary. an auxiliary verb characteristically used with other verbs to express mood, aspect, or tense. in english, the most common modal auxiliaries are can, could, may, might, must, ought, shall, should, will, and would. also called modal .