| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [vb pp] [art] [noun] | 4156 |
|
| 2 | could [verb] [vb pp] [art] [noun] | 577 |
|
| 3 | could have [verb] [art] [noun] | 576 |
|
