| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [pron] [noun] | 2487 |
|
| 2 | could [vb infin] [pron] [adv] | 831 |
|
| 3 | [vb infin] [pron] [adv] [noun] | 201 |
|
| 4 | could [vb infin] [adv] [noun] | 96 |
|
