| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] not [be] able to be | 10 |
|
| 2 | [modal v] not [be] able to be | 10 |
|
| 3 | not [be] able to be [vb pp] | 7 |
|
| 4 | not [be] able to be [verb] | 7 |
|
