| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] i could have | 133 |
|
| 2 | [vb pp] i [modal v] have | 47 |
|
| 3 | [vb pp] [pron] could have | 41 |
|
| 4 | [vb pp] i could [vb infin] | 22 |
|
| 5 | [vb pp] i could [verb] | 22 |
|
| 6 | [vb pp] i could have | 5 |
|
