| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must [verb] be | 782 |
|
| 2 | it [verb] be [det] | 139 |
|
| 3 | must [verb] be [det] | 100 |
|
| 4 | it must [verb] [det] | 49 |
|
| 5 | it must be [det] | 43 |
|
