| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] [prep] three years | 5 |
|
| 2 | had be [verb] [prep] three years | 5 |
|
| 3 | had [be] [vb pp] [prep] three years | 5 |
|
| 4 | had [been] [verb] [prep] three years | 5 |
|
