What is the difference between imperfect and presente

Imperfect tense - The translations in English for the imperfect are “used to...” and “I was -ing” (EX. Comía = “I used to eat” and “I was eating”)

Present tense - The translations in the English for the present are “I am -ing” and “I do ...” (EX. Como = “I am eating” and “i do eat”)

1. no, no necesito ese taza.2. si, por favor.3. prefiero el flan por favor.4. no gracias.5. prefiero el helado de chocolate por favori hope this i did the best i could