| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i [vb past] i [vb mod] [verb] at | 9 |
|
| 2 | i [vb past] i [modal v] [verb] at | 9 |
|
| 3 | i [vb past] i [modal v] [vb infin] at | 9 |
|
| 4 | i [vb past] i [modal v] [verb] at | 9 |
|
