| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [adv] [vb infin] [verb] | 2373 |
|
| 2 | who [modal v] [adv] [vb infin] [verb] | 362 |
|
| 3 | who could [adv] [verb] [verb] | 62 |
|
