写出下列动词过去式的原形。
1. did→________ 2. was→________
3. saw→________ 4. read→________
5. made→________ 6. cooked→________
7. played→________ 8. were→________
9. had→________ 10. stayed→________
【答案】1. do 2. is/am 3. see 4. read 5. make 6. cook 7. play 8. are 9. have 10. stay
【解析】