| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [pron] has n't [been] able | 6 |
|
| 2 | [pron] has n't [been] able [verb] | 9 |
|
| 3 | [pron] has n't [been] able [to-vb] | 9 |
|
