| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] a [adj] | 1109 |
|
| 2 | must [verb] a [adj] | 587 |
|
| 3 | must be a [adj] | 406 |
|
| 4 | must be [verb] [adj] | 284 |
|
| 5 | must be [verb] a | 98 |
|
