| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [art] [adj] | 303 |
|
| 2 | could [verb] [art] [num ord] | 86 |
|
| 3 | [vb mod] have [art] [num ord] | 54 |
|
| 4 | [modal v] have [art] [num ord] | 54 |
|
| 5 | could have [art] [num ord] | 5 |
|
