| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [adv] [verb] | 17890 |
|
| 2 | must [adv] [verb] | 4551 |
|
| 3 | it must [verb] | 1992 |
|
| 4 | it must [adv] | 542 |
|
