| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [been] a [adj] | 4638 |
|
| 2 | must [verb] [been] [adj] | 761 |
|
| 3 | must [verb] a [adj] | 648 |
|
| 4 | must [verb] [been] a | 430 |
|
