| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been able [verb] some | 6 |
|
| 2 | [vb mod] have [been] able [verb] some | 6 |
|
| 3 | [modal v] have [been] able [to-vb] some | 6 |
|
| 4 | may have [been] able [verb] some | 5 |
|
| 5 | [modal v] have [been] able [verb] some | 5 |
|
| 6 | may have [been] able [verb] some | 5 |
|
