| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have said | 48 |
|
| 2 | could [adv] have said | 48 |
|
| 3 | could [not/n't] have said | 41 |
|
| 4 | could not have said | 41 |
|
| 5 | could not have said | 21 |
|
| 6 | could n't have said | 20 |
|
| 7 | could [adv] have said | 7 |
|
