【题目】请写出下列动词的过去式。
1. is/am __________ 2. hop __________
3. walk __________ 4. play __________
5. are __________ 6. do __________
7. have __________ 8. help __________
9. cook __________ 10. talk __________
【答案】1. was 2. hopped 3. walked 4. played 5. were 6. did 7. had 8. helped 9. cooked 10. talked
【解析】
略
