| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] had been [v-ing] [prep] | 702 |
|
| 2 | had been [v-ing] [prep] [noun pl] | 83 |
|
| 3 | [noun] had been [v-ing] [noun pl] | 49 |
|
| 4 | [noun] had been [prep] [noun pl] | 34 |
|
