| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] teachers ' [noun] on | 5 |
|
| 2 | [adj] teachers ' [noun] on | 5 |
|
| 3 | teachers ' [noun] on [noun] | 7 |
|
| 4 | teachers ' [noun] on [adj] | 5 |
|
