| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been [verb] [prep] | 318 |
|
| 2 | have been [verb] up [prep] | 62 |
|
| 3 | must have been [verb] up | 13 |
|
| 4 | must have [verb] up [prep] | 12 |
|
