| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [noun] must have been [noun] | 5 |
|
| 2 | [noun] must have been [art] [noun] | 49 |
|
| 3 | [noun] must have been [art] [noun] | 49 |
|
| 4 | [noun] must have been a [noun] | 39 |
|
| 5 | [noun] must have been a [noun] | 32 |
|
| 6 | [noun] must have been [prep] [noun] | 15 |
|
| 7 | [noun] must have been [prep] [noun] | 15 |
|
| 8 | [noun] must have been [adj] [noun] | 10 |
|
| 9 | [noun] must have been in [noun] | 9 |
|
| 10 | [noun] must have been in [noun] | 9 |
|
| 11 | [noun] must have been the [noun] | 8 |
|
| 12 | [noun] must have been the [noun] | 8 |
|
| 13 | [noun] must have been an [noun] | 7 |
|
| 14 | [noun] must have been [verb] [noun] | 7 |
|
| 15 | [noun] must have been [v-ing] [noun] | 5 |
|
| 16 | [noun] must have been [adj] [noun] | 5 |
|
