| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have [been] [vb pp] [prep] [adj] | 34 |
|
| 2 | [vb mod] have [been] [vb pp] [prep] some | 34 |
|
| 3 | [modal v] have [been] [vb pp] [prep] some | 34 |
|
| 4 | must have [been] [verb] [prep] some | 10 |
|
| 5 | must have [been] [vb pp] [prep] some | 8 |
|
| 6 | must have [be] [vb pp] [prep] some | 8 |
|
| 7 | must have [been] [vb pp] [prep] some | 8 |
|
| 8 | must [verb] [been] [vb pp] [prep] some | 8 |
|
