| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [vb pp] [det] [noun pl] | 223 |
|
| 2 | could have [vb pp] [det] [noun] | 135 |
|
| 3 | could have [vb pp] [adj] [noun pl] | 69 |
|
| 4 | could [verb] [vb pp] [det] [noun pl] | 23 |
|
| 5 | could have [verb] [det] [noun pl] | 23 |
|
