| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] been [det] [noun] [Wh pn] | 8 |
|
| 2 | [vb mod] [vb infin] been [det] [noun] [Wh pn] | 8 |
|
| 3 | must [vb infin] been [det] [noun] [Wh pn] | 7 |
|
| 4 | must [vb infin] been [det] [noun] [Wh pn] | 7 |
|
| 5 | [vb infin] been [det] [noun] [Wh pn] [vb past] | 5 |
|
| 6 | [vb infin] been [det] [noun] [Wh pn] [verb] | 5 |
|
