| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] had been [v-ing] | 3168 |
|
| 2 | [pron] had been at | 210 |
|
| 3 | had been [v-ing] at | 148 |
|
| 4 | [pron] been [v-ing] at | 15 |
|
