| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] [prep] a | 1700 |
|
| 2 | they had been [verb] [prep] | 513 |
|
| 3 | they had [verb] [prep] a | 130 |
|
| 4 | they had been [verb] a | 21 |
|
| 5 | they had been [prep] a | 5 |
|
