Used for emphasis to insist that one does, has done, or has something. The phrase typically ends the sentence or is followed by a verb. A: "I don't think you finished your homework." B: "I did too!" A: "Honey, you're fine. You don't have a fever." B: "I do too have a fever! Feel my forehead again!"
do tooand do so
to do something (despite anything to the contrary). (An emphatic way of saying do.) Bob: You don't have your money with you. Bill: I do too! He does so! I saw him put it in his pocket. She did too take a cookie. I saw her do it.