| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [verb] a [adj] | 39 |
|
| 2 | they must [verb] a [adj] | 33 |
|
| 3 | they must be [verb] a | 9 |
|
| 4 | they must be [verb] [adj] | 9 |
|
