| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [adv] | 3625 |
|
| 2 | could [vb infin] [noun sg] | 2304 |
|
| 3 | [vb infin] [adv] [noun sg] | 346 |
|
| 4 | could [adv] [noun sg] | 41 |
|
