| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been [verb] [prep] | 318 |
|
| 2 | have been [verb] [prep] some | 45 |
|
| 3 | must have [verb] [prep] some | 21 |
|
| 4 | must have been [prep] some | 6 |
|
