| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been a [adj] [noun] | 634 |
|
| 2 | [vb mod] have been a [adj] [noun] | 634 |
|
| 3 | must have been [art] [adj] [noun] | 240 |
|
| 4 | must have been [art] [adj] [noun] | 240 |
|
| 5 | must have been a [adj] [noun] | 199 |
|
| 6 | must have been a [adj] [noun] | 177 |
|
| 7 | must [vb infin] been a [adj] [noun] | 177 |
|
| 8 | must [verb] been a [adj] [noun] | 177 |
|
| 9 | must have been a [adj] [noun] | 176 |
|
| 10 | must have [been] a [adj] [noun] | 176 |
|
| 11 | must have be a [adj] [noun] | 176 |
|
| 12 | must have [be] a [adj] [noun] | 176 |
|
