| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [noun] [noun sg] | 29 |
|
| 2 | could [adv] [vb infin] [noun sg] [noun sg] | 21 |
|
| 3 | could only [vb infin] [noun] [noun sg] | 5 |
|
| 4 | could [adv] [vb infin] [noun prp] [noun sg] | 5 |
|
