| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] had been [v-ing] [prep] | 133 |
|
| 2 | had been [v-ing] [prep] [noun pl] | 83 |
|
| 3 | [noun pl] had been [v-ing] [noun pl] | 16 |
|
| 4 | [noun pl] had been [prep] [noun pl] | 10 |
|
