| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i had been able [verb] | 18 |
|
| 2 | i had be able [verb] | 18 |
|
| 3 | i had [be] able [to-vb] | 18 |
|
| 4 | i had [been] able [verb] | 18 |
|
