| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [verb] [prep] [det] | 3262 |
|
| 2 | must have [been] [verb] [prep] | 320 |
|
| 3 | must have [verb] [prep] [det] | 64 |
|
| 4 | must have [been] [prep] [det] | 26 |
|
| 5 | must have [been] [verb] [det] | 17 |
|
