| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [vb pp] [pron] | 1445 |
|
| 2 | must [verb] [vb pp] [pron] | 1105 |
|
| 3 | it must [verb] [vb pp] | 287 |
|
| 4 | it must [verb] [pron] | 100 |
|
