| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [adv] [prep] [art] | 619 |
|
| 2 | [modal v] [verb] on [prep] [art] | 300 |
|
| 3 | [vb mod] [verb] on [prep] [art] | 300 |
|
| 4 | could [verb] on [prep] [art] | 37 |
|
| 5 | could [verb] on [prep] [art] | 37 |
|
