| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have not been able [to-vb] [noun] | 15 |
|
| 2 | have not been able [verb] [noun pl] | 7 |
|
| 3 | had not been able [verb] [noun] | 6 |
|
| 4 | have not been able [verb] [noun] | 6 |
|
| 5 | have not been able [verb] [noun sg] | 6 |
|
