| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] have [adj] | 2928 |
|
| 2 | could [not/n't] have | 1780 |
|
| 3 | could have [adj] | 438 |
|
| 4 | could [not/n't] [adj] | 58 |
|
