| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [v-ing] [prep] [adj] | 304 |
|
| 2 | which had been [v-ing] [prep] | 64 |
|
| 3 | which had been [v-ing] [adj] | 13 |
|
| 4 | which had been [prep] [adj] | 6 |
|
