| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [not/n't] have have a better | 7 |
|
| 2 | [modal v] [not/n't] have had a better | 7 |
|
| 3 | could [not/n't] have have a better | 7 |
|
| 4 | [modal v] [not/n't] have have a better | 7 |
|
| 5 | could [not/n't] have have a better | 7 |
|
