| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must [verb] be [adv] [det] | 7 |
|
| 2 | [pers pn] must [verb] be [adv] [det] | 6 |
|
| 3 | it must [verb] be [adv] [det] | 5 |
|
| 4 | it must [verb] be [adv] [det] | 5 |
|
