| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [that] it [modal v] [verb] | 388 |
|
| 2 | [vb past] [that] [pron] must [verb] | 131 |
|
| 3 | [verb] [that] it must [verb] | 50 |
|
| 4 | [vb past] [conj] it must [verb] | 17 |
|
