| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] n't be able | 714 |
|
| 2 | [vb mod] be able to | 239 |
|
| 3 | n't be able to | 61 |
|
| 4 | [vb mod] n't be to | 7 |
|
