| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [verb] n't been able | 171 |
|
| 2 | [adv] [pron] [verb] n't been | 106 |
|
| 3 | [adv] [pron] [verb] been able | 41 |
|
| 4 | [adv] [verb] n't been able | 10 |
|
