| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] [to-vb] [adv] | 2104 |
|
| 2 | [vb mod] [vb infin] [to-vb] [adv] | 2104 |
|
| 3 | could [vb infin] [verb] [adv] | 489 |
|
| 4 | could [vb infin] [to-vb] [adv] | 145 |
|
| 5 | could [vb infin] [to-vb] [adv] | 74 |
|
| 6 | could [verb] [to-vb] [adv] | 74 |
|
