| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] have not been able | 340 |
|
| 2 | [Wh pn] have not been [adj] | 37 |
|
| 3 | [Wh pn] have [adv] been able | 20 |
|
| 4 | [Wh pn] have not [be] able | 12 |
|
| 5 | [Wh pn] have not [been] able | 12 |
|
| 6 | [Wh pn] have not be able | 12 |
|
| 7 | [Wh pn] [verb] not been able | 12 |
|
