| 1. | We were cleaning the classroom when they came in 他们进来的时候我们在打扫教室。 |
| 2. | She herself cleaned the classroom this morning 今天早上,她自己打扫了教室。 |
| 3. | The students clean the classroom in turns everyday 学生们每天轮流打扫教室。 |
| 4. | The students clean the classroom everyday in turn 学生们每天轮流打扫教室。 |
| 5. | We found the key while we were cleaning the classroom 我们在打扫教室时发现了这把钥匙 |
| 6. | The students clean the classroom everyday in turn 学生们每天轮流打扫教室 |
| 7. | Students clean the classroom in turn everyday 学生们每天轮流打扫教室。 |
| 8. | Students clean the classroom everyday in turn 学生们每天轮流打扫教室。 |
| 9. | The students take turn to clean the classroom 学生们每天轮流打扫教室。 |
| 10. | At school , we have to clean the classroom 12在学校,我们必须打扫教室。 |