| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i have not been able | 98 |
|
| 2 | i [vb base] not been able | 86 |
|
| 3 | i have not been able | 76 |
|
| 4 | i [verb] n't been able | 60 |
|
| 5 | i [verb] not been able | 38 |
|
| 6 | i [vb past] not been able | 12 |
|
| 7 | i had not been able | 12 |
|
| 8 | i 've not been able | 10 |
|
