| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [modal v] have [been] [noun] | 250 |
|
| 2 | [pron] must have [been] [noun] | 78 |
|
| 3 | [pers pn] must [verb] [been] [noun] | 53 |
|
| 4 | [pers pn] must have [be] [noun] | 53 |
|
