| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [vb pp] [adv] | 372 |
|
| 2 | could [vb infin] [vb pp] [noun] | 311 |
|
| 3 | could [vb infin] [adv] [noun] | 96 |
|
| 4 | [vb infin] [vb pp] [adv] [noun] | 64 |
|
