B1used to avoid repeating a verb or verb phrase: She runs much faster than he does.Maria looks much healthier than she did."I don't like intense heat." "Nor/Neither do I.""I hate intense heat." "So do I.""You left your umbrella." "So I did. I'm becoming so forgetful these days.""Would you mind tidying up the kitchen?" "I already have done.""May I join you?" "Please do!""Who said that?" "I did.""Tilly speaks fluent Japanese." "Does she really?""I thought I'd take a day off school today." "Oh no you don't (= I'm not going to let you do that)!"