| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] only be | 3856 |
|
| 2 | must [adv] be | 2734 |
|
| 3 | must [adv] be | 1920 |
|
| 4 | must only be | 21 |
|
| 5 | must only [be] | 21 |
|
