| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] | 32770 |
|
| 2 | [adv] [vb infin] [noun sg] | 13375 |
|
| 3 | could [vb infin] [noun sg] | 2304 |
|
| 4 | could [adv] [noun sg] | 87 |
|
