おそらくここでの do は他動詞として「object をする」という意味の do
hear /híɚ/
transitive verb
hear + object
hear + object + base verb
hear + object + verb-ing
hear + object + past participle
intransitive verb
hear
hear + from + noun
hear + of …
hear + about …
obviously /άbviəsli/
adverb