| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [vb pp] [art] [noun] [to-vb] | 16 |
|
| 2 | could have [verb] [art] [noun] [to-vb] | 16 |
|
| 3 | could have [verb] the [noun] [to-vb] | 15 |
|
| 4 | could have [verb] the [noun] [to-vb] | 15 |
|
| 5 | could have [verb] [art] [noun sg] [to-vb] | 14 |
|
