| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] at the time | 20 |
|
| 2 | had be [verb] at the time | 20 |
|
| 3 | had be [verb] at the time | 20 |
|
| 4 | had be [vb pp] at the time | 19 |
|
