| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] been [vb pp] | 2673 |
|
| 2 | been [vb pp] so | 391 |
|
| 3 | [to-vb] [vb pp] so | 81 |
|
| 4 | [to-vb] been so | 12 |
|
