| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [v-ing] [prep] the | 501 |
|
| 2 | they had been [v-ing] [prep] | 110 |
|
| 3 | they had been [prep] the | 98 |
|
| 4 | they had been [v-ing] the | 16 |
|
