| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] [vb infin] [art] | 14745 |
|
| 2 | could [adv] [vb infin] [art] | 4685 |
|
| 3 | could [adv] [verb] [art] | 1905 |
|
