| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] [vb infin] [noun] | 6928 |
|
| 2 | could [adv] [vb infin] [noun] | 1732 |
|
| 3 | could [adv] [verb] [noun] | 813 |
|
