| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that had been [v-ing] [prep] | 57 |
|
| 2 | it had been [v-ing] [prep] | 41 |
|
| 3 | that it had been [v-ing] | 9 |
|
| 4 | that it had been [prep] | 9 |
|
