| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [prep] [art] | 1396 |
|
| 2 | [verb] [been] [prep] a | 874 |
|
| 3 | have [been] [prep] a | 873 |
|
| 4 | [vb past] [been] [prep] a | 320 |
|
| 5 | had [be] [prep] a | 284 |
|
| 6 | had [been] [prep] a | 282 |
|
