1. GRAMMAR SPOT Simple Past The verbs in Simple Present can have a Regular form ( –ed) or Irregular form. We use Simple Past for something in the past which is finished. DID Did you study math yesterday? Yes, I did. No, I didn’t. Yes, I studied math yesterday. No, I didn’t study math yesterday. DID Did she take the bus to school last Monday? Yes, she did. No, she didn’t. Yes, she took the bus to school last Monday. No, she didn’t take the bus to school last Monday.