| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] [art] teachers ' | 20 |
|
| 2 | [verb] [prep] the teachers ' | 14 |
|
| 3 | [vb pp] [prep] [art] teachers ' | 14 |
|
| 4 | [verb] by [art] teachers ' | 9 |
|
| 5 | [verb] by [art] teachers ' | 9 |
|
| 6 | [verb] [prep] a teachers ' | 6 |
|
