| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [adj] be [vb pp] | 80 |
|
| 2 | must [adj] be [verb] | 80 |
|
| 3 | must [num ord] be [verb] | 58 |
|
| 4 | must first be [verb] | 57 |
|
| 5 | must first be [verb] | 57 |
|
| 6 | must [det] be [verb] | 22 |
|
| 7 | must all be [verb] | 21 |
|
| 8 | must all be [verb] | 21 |
|
