| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] have [vb pp] a | 82 |
|
| 2 | could not have [vb pp] a | 82 |
|
| 3 | could [adv] have [vb pp] a | 48 |
|
| 4 | could not have [vb pp] a | 44 |
|
| 5 | could n't have [vb pp] a | 38 |
|
| 6 | could [adv] have chosen a | 20 |
|
| 7 | could [adv] have had a | 16 |
|
| 8 | could [adv] have made a | 11 |
|
| 9 | could hardly have [vb pp] a | 11 |
|
| 10 | could hardly have [vb pp] a | 11 |
|
| 11 | could easily have [vb pp] a | 9 |
|
| 12 | could easily have [vb pp] a | 9 |
|
| 13 | could never have [vb pp] a | 8 |
|
| 14 | could [adv] have found a | 8 |
|
| 15 | could never have [vb pp] a | 8 |
|
| 16 | could well have [vb pp] a | 6 |
|
| 17 | could [adv] have got a | 6 |
|
| 18 | could well have [vb pp] a | 6 |
|
| 19 | could [adv] have picked a | 5 |
|
