| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] be able to [subord] | 8 |
|
| 2 | [vb mod] [not/n't] be able to [subord] | 8 |
|
| 3 | [not/n't] be able to [subord] [pron] | 5 |
|
