| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been a [adj] [noun] | 671 |
|
| 2 | must have been a [adj] | 185 |
|
| 3 | must have been a [noun] | 179 |
|
| 4 | must have a [adj] [noun] | 175 |
|
| 5 | must have been [adj] [noun] | 42 |
|
