| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [to-vb] in | 1578 |
|
| 2 | [be] [vb pp] [to-vb] been | 1214 |
|
| 3 | [vb pp] [to-vb] been in | 33 |
|
