| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and it could [adv] have | 13 |
|
| 2 | and it could [adv] have | 13 |
|
| 3 | and it could [adv] have | 8 |
|
| 4 | and it could [not/n't] have | 5 |
|
| 5 | and it could not have | 5 |
|
