| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have [vb pp] [art] [noun] | 77 |
|
| 2 | could [adv] have [verb] [art] [noun sg] | 65 |
|
| 3 | could [adv] have [verb] the [noun] | 49 |
|
| 4 | could [adv] have [verb] a [noun] | 23 |
|
| 5 | could easily have [verb] [art] [noun] | 15 |
|
| 6 | could never have [verb] [art] [noun] | 14 |
|
| 7 | could hardly have [verb] [art] [noun] | 8 |
|
| 8 | could [adv] have [verb] [art] [noun pl] | 8 |
|
| 9 | could well have [verb] [art] [noun] | 7 |
|
| 10 | could probably have [verb] [art] [noun] | 6 |
|
