| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [vb infin] been [noun] of | 57 |
|
| 2 | [modal v] [vb infin] been [noun] of | 57 |
|
| 3 | must [vb infin] been [noun] [prep] | 29 |
|
| 4 | must [vb infin] be [noun] of | 12 |
|
| 5 | must [vb infin] been [noun] of | 12 |
|
| 6 | must [vb infin] [been] [noun] of | 12 |
|
| 7 | must [verb] been [noun] of | 12 |
|
| 8 | must [vb infin] [be] [noun] of | 12 |
|
