| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must have been [noun] [noun] | 14 |
|
| 2 | [pers pn] must have been [noun] [noun] | 9 |
|
| 3 | it must have been [noun] [noun] | 8 |
|
| 4 | it must have been [noun] [noun] | 8 |
|
| 5 | must have been [art] [noun] [noun] | 20 |
|
| 6 | must have been [art] [noun] [noun] | 20 |
|
| 7 | must have been a [noun] [noun] | 15 |
|
| 8 | must have been a [noun] [noun] | 14 |
|
| 9 | must have been the [noun] [noun] | 5 |
|
| 10 | must have been the [noun] [noun] | 5 |
|
| 11 | must have been [noun] [prep] [noun] | 7 |
|
| 12 | must have been [noun] [prep] [noun] | 7 |
|
