| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [det] | 3315 |
|
| 2 | [modal v] have [det] | 3026 |
|
| 3 | [vb mod] have [det] | 3026 |
|
| 4 | could have [adj] | 438 |
|
| 5 | could have [det] | 178 |
|
