| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [adv] been [v-ing] [prep] | 134 |
|
| 2 | they had been [v-ing] [prep] | 110 |
|
| 3 | they had [adv] been [v-ing] | 28 |
|
| 4 | they had [adv] been [prep] | 25 |
|
