| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [adv] | 6030 |
|
| 2 | had been [v-ing] | 5819 |
|
| 3 | been [v-ing] [adv] | 3532 |
|
| 4 | had [v-ing] [adv] | 7 |
|
