| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] had [been] | 25566 |
|
| 2 | which [verb] [been] | 6252 |
|
| 3 | which have [been] | 6251 |
|
| 4 | which [vb past] [been] | 2745 |
|
| 5 | which had [be] | 2745 |
|
