Which revision of this sentence uses a participial phrase? The bathtub was slow to drain after the dog's bath.
O The bathtub in my bathroom was slow to drain after the dog's bath.
O The bathtub, clogged with dirt and hair, was slow to drain after the dog's bath.
O The bathtub, its rim caked with dirt, was slow to drain after the dog's bath.
O The bathtub was slow to drain because the dog shed hair and dirt.

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 .