| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been some [noun] | 34 |
|
| 2 | [modal v] have been some sort | 10 |
|
| 3 | must have been [adj] sort | 6 |
|
| 4 | must [verb] been some sort | 6 |
|
| 5 | must have [been] some sort | 6 |
|
| 6 | must have be some sort | 6 |
|
| 7 | must have [be] some sort | 6 |
|
