| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [pron] [adv] [vb infin] | 597 |
|
| 2 | could [adv] [vb infin] [noun sg] | 378 |
|
| 3 | [pron] [adv] [vb infin] [noun sg] | 171 |
|
| 4 | could [pron] [vb infin] [noun sg] | 70 |
|
