| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [prep] | 3635 |
|
| 2 | [been] [prep] [det] | 1064 |
|
| 3 | had [been] [det] | 529 |
|
| 4 | had [prep] [det] | 369 |
|
