| 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. | The students clean the classroom in turns everyday
学生们每天轮流打扫教室。 |
| 3. | The students clean the classroom everyday in turn
学生们每天轮流打扫教室。 |
| 4. | Two pupils were assigned to sweep the classroom
两个学生被指派打扫教室。 |
| 5. | Students clean the class room in turns everyday
学生们每天轮流打扫教室。 |
| 6. | 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 |
| 7. | The students clean the classroom everyday in turn
学生们每天轮流打扫教室 |
| 8. | Students clean the classroom in turn everyday
学生们每天轮流打扫教室。 |
| 9. | Students clean the classroom everyday in turn
学生们每天轮流打扫教室。 |
| 10. | Students clear the classroom in turn everyday
学生们每天轮流打扫教室。 |
