| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] [coord] [vb mod] be [adv] | 6 |
|
| 2 | must [vb infin] [coord] [vb mod] be [adv] | 6 |
|
| 3 | must exist [coord] [vb mod] be [adv] | 5 |
|
| 4 | must exist [conj] [vb mod] be [adv] | 5 |
|
| 5 | must exist [coord] [modal v] be [adv] | 5 |
|
| 6 | must exist [coord] [vb mod] [be] [adv] | 5 |
|
| 7 | [modal v] exist [coord] [vb mod] be [adv] | 5 |
|
