| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [adv] [be] [vb pp] to be | 14 |
|
| 2 | must [adv] be [verb] to be | 14 |
|
| 3 | must [adv] [be] [verb] to be | 9 |
|
| 4 | must [adv] [be] see to be | 6 |
|
| 5 | must [adv] [be] seen to be | 6 |
|
| 6 | must not [be] [verb] to be | 5 |
|
| 7 | must [not/n't] [be] [verb] to be | 5 |
|
