| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [not/n't] be able | 1591 |
|
| 2 | [vb mod] be able to | 239 |
|
| 3 | [not/n't] be able to | 89 |
|
| 4 | [vb mod] [not/n't] be to | 28 |
|
