| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who had been [v-ing] [prep] | 160 |
|
| 2 | [noun pl] had been [v-ing] [prep] | 133 |
|
| 3 | [noun pl] who had been [v-ing] | 66 |
|
| 4 | [noun pl] who had been [prep] | 57 |
|
