| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] [modal v] [vb infin] | 7622 |
|
| 2 | [vb past] [pron] [vb mod] [vb infin] | 7622 |
|
| 3 | [verb] [pron] must [vb infin] | 1260 |
|
| 4 | [vb past] [pron] must [vb infin] | 347 |
|
| 5 | [vb past] [pron] must [verb] | 347 |
|
