The negative form is "I have not done" or "I haven't done". You use the first form for emphasis and in formal written contexts, and the contraction ( haven't) in spoken and informal/neutral contexts. To form a question, you reverse the subject (I) and auxiliary verb (have) : "Have I done?" Two important points: - The pronoun 'I' is always written with a capital letter 'I' - never 'i'. - There is no such thing is 'American grammar'! There is only one English language, and one grammatical system used throughout the English-speaking world.

Negative: I have not done ... or I haven't done... Question: Have I done...? Or Have you done...? Alternatively, you could also use Have I completed...? Examples: Have I done the dishes? Have I completed this assignment correctly? I haven't done that yet.