| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [adv] have [verb] [prep] | 6 |
|
| 2 | could n't [adv] have [verb] [prep] | 6 |
|
| 3 | could n't [adv] have [vb pp] [prep] | 6 |
|
