| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [Wh pn] had been [v-ing] on | 9 |
|
| 2 | [noun sg] [Wh pn] had been [v-ing] on | 7 |
|
| 3 | [Wh pn] had been [v-ing] on [art] | 12 |
|
| 4 | [Wh pn] had been [v-ing] on [art] | 12 |
|
| 5 | [Wh pn] had been [v-ing] on the | 11 |
|
| 6 | [Wh pn] had been [v-ing] on the | 11 |
|
