| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] be able to [noun] | 7 |
|
| 2 | [vb mod] [not/n't] be able to [noun] | 7 |
|
| 3 | [not/n't] be able [verb] to [noun] | 7 |
|
| 4 | [not/n't] be able [to-vb] to [noun] | 7 |
|
