| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been a [adj] | 201 |
|
| 2 | must have been [adj] [conj] | 73 |
|
| 3 | have been a [adj] [conj] | 31 |
|
| 4 | must have a [adj] [conj] | 6 |
|
