| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] have | 1780 |
|
| 2 | could not have | 1779 |
|
| 3 | could [adv] have | 1475 |
|
| 4 | could not have | 951 |
|
| 5 | could n't have | 828 |
|
| 6 | could never have | 187 |
|
| 7 | could never have | 187 |
|
| 8 | could easily have | 172 |
|
| 9 | could easily have | 172 |
|
| 10 | could well have | 164 |
|
| 11 | could hardly have | 162 |
|
| 12 | could well have | 162 |
|
| 13 | could hardly have | 162 |
|
| 14 | could only have | 129 |
|
| 15 | could only have | 129 |
|
| 16 | could ever have | 85 |
|
| 17 | could ever have | 85 |
|
| 18 | could possibly have | 78 |
|
| 19 | could possibly have | 78 |
|
| 20 | could also have | 66 |
|
| 21 | could also have | 66 |
|
| 22 | could probably have | 33 |
|
| 23 | could probably have | 33 |
|
| 24 | could still have | 31 |
|
| 25 | could still have | 31 |
|
| 26 | could scarcely have | 28 |
|
| 27 | could scarcely have | 28 |
|
| 28 | could reasonably have | 27 |
|
| 29 | could reasonably have | 27 |
|
| 30 | could even have | 25 |
|
