| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] [prep] [adj] | 10037 |
|
| 2 | must have been [verb] [prep] | 320 |
|
| 3 | must have [verb] [prep] [adj] | 117 |
|
| 4 | must have been [prep] [adj] | 51 |
|
| 5 | must have been [verb] [adj] | 34 |
|
