| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] n't been [adv] successful | 11 |
|
| 2 | have n't been [adv] successful | 11 |
|
| 3 | had n't been [adv] successful | 5 |
|
| 4 | [vb past] n't been [adv] successful | 5 |
|
