| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [noun] | 809 |
|
| 2 | could [adv] [vb infin] [adv] | 417 |
|
| 3 | could [vb infin] [adv] [noun] | 96 |
|
| 4 | [adv] [vb infin] [adv] [noun] | 74 |
|
