2. Regular: looked, said, visited, watched, helped, danced, walked;irregular: came, ate, drank, was, rode, swam, ran, learned, were. 3. have - had; pick - picked;play - played; go - went; fly - flied; drive - drove; listen - listened; take - took; give - gave. 4. 1) Cave people didn't live in houses. 2) Cave people didn't eat pizza. 3) Cave people didn't watch TV. 4) Cave people didn't go to school. 5) Cave people didn't wear dresses. 5. 1) Did I go to school yesterday? 2) Did Liz visit her granny in summer? 3) Did Mary play the piano in the evening? 4) Did cave people wear animal skins?5) Was I at the seaside in summer?