| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [noun] | 5154 |
|
| 2 | [vb mod] have [noun] | 3181 |
|
| 3 | [modal v] have [noun] | 3181 |
|
| 4 | could have [noun] | 177 |
|
