| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [pron] [adv] [noun sg] | 7 |
|
| 2 | could [verb] [pron] [adv] [noun sg] | 7 |
|
| 3 | could [verb] [pers pn] [adv] [noun sg] | 5 |
|
