| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not been able [verb] | 266 |
|
| 2 | been able [verb] [noun] | 216 |
|
| 3 | not been [verb] [noun] | 53 |
|
| 4 | not able [verb] [noun] | 37 |
|
