| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [v-ing] [prep] [noun] | 400 |
|
| 2 | [noun pl] had been [v-ing] [prep] | 133 |
|
| 3 | [noun pl] had been [prep] [noun] | 100 |
|
| 4 | [noun pl] had been [v-ing] [noun] | 45 |
|
