| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [det] | 1572 |
|
| 2 | could [adv] [adv] [vb infin] | 973 |
|
| 3 | could [adv] [vb infin] [det] | 449 |
|
| 4 | [adv] [adv] [vb infin] [det] | 274 |
|
