| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [verb] been in a [noun] | 28 |
|
| 2 | [modal v] [verb] been in a [noun] | 28 |
|
| 3 | must [verb] been in [art] [noun] | 26 |
|
| 4 | must [verb] been in [art] [noun] | 26 |
|
| 5 | must [verb] been [prep] a [noun] | 16 |
|
| 6 | must [verb] been [prep] a [noun] | 16 |
|
| 7 | must [verb] [been] in a [noun] | 7 |
|
| 8 | must [verb] [be] in a [noun] | 7 |
|
| 9 | must [verb] been in a [noun] | 7 |
|
| 10 | must [verb] been in a [noun] | 7 |
|
| 11 | must [verb] been in a [noun] | 7 |
|
| 12 | must [verb] be in a [noun] | 7 |
|
