| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have [verb] | 1825 |
|
| 2 | could [adv] have [vb pp] | 1824 |
|
| 3 | could [not/n't] have [verb] | 1018 |
|
| 4 | could not have [verb] | 1017 |
|
| 5 | could [adv] have [verb] | 807 |
|
| 6 | could not have [verb] | 548 |
|
| 7 | could n't have [verb] | 469 |
|
| 8 | could never have [verb] | 132 |
|
| 9 | could never have [verb] | 132 |
|
| 10 | could [adv] have done | 128 |
|
| 11 | could [adv] have do | 128 |
|
| 12 | could easily have [verb] | 106 |
|
| 13 | could easily have [verb] | 106 |
|
| 14 | could well have [verb] | 85 |
|
| 15 | could hardly have [verb] | 84 |
|
| 16 | could well have [verb] | 84 |
|
| 17 | could hardly have [verb] | 84 |
|
| 18 | could [adv] have come | 68 |
|
| 19 | could [adv] have come | 68 |
|
| 20 | could [adv] have have | 65 |
|
| 21 | could [adv] have had | 65 |
|
| 22 | could ever have [verb] | 62 |
|
| 23 | could ever have [verb] | 62 |
|
| 24 | could possibly have [verb] | 50 |
|
| 25 | could possibly have [verb] | 50 |
|
| 26 | could [adv] have say | 48 |
|
| 27 | could [adv] have said | 48 |
|
| 28 | could only have [verb] | 47 |
|
| 29 | could only have [verb] | 47 |
|
| 30 | could [adv] have know | 46 |
|
