| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [adv] been [v-ing] | 373 |
|
| 2 | had been [v-ing] on | 185 |
|
| 3 | had [adv] been on | 61 |
|
| 4 | [adv] been [v-ing] on | 30 |
|
