| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [verb] | 50340 |
|
| 2 | [vb mod] have [verb] | 50340 |
|
| 3 | could [verb] [verb] | 7462 |
|
| 4 | could have [verb] | 5379 |
|
