| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to have been a | 292 |
|
| 2 | [not/n't] [verb] to have been | 163 |
|
| 3 | [not/n't] [verb] to have a | 141 |
|
| 4 | [not/n't] [verb] been a | 117 |
|
| 5 | [not/n't] to have been a | 7 |
|
