| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [noun] | 809 |
|
| 2 | [adv] [vb infin] [noun prp] [noun] | 371 |
|
| 3 | could [vb infin] [noun prp] [noun] | 251 |
|
| 4 | could [adv] [vb infin] [noun prp] | 181 |
|
