| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [prep] [adj] | 1750 |
|
| 2 | must have [been] [adj] | 760 |
|
| 3 | must have [been] [prep] | 294 |
|
| 4 | must have [prep] [adj] | 5 |
|
