| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [vb pp] [prep] [art] | 2467 |
|
| 2 | could have [vb pp] [prep] | 862 |
|
| 3 | could have [vb pp] [art] | 817 |
|
| 4 | could have [prep] [art] | 17 |
|
