写出下列单词的过去式。go → went
1. watch → ________________
2. have→ ________________
3. eat→ ________________
4. see→ ________________
5. dance→ ________________
6. buy→ ________________
7. take→ ________________
8. sing → ________________1. watched 2. had 3. ate 4. saw 5. danced 6. bought 7. took 8. sang