| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [verb] n't [been] able | 171 |
|
| 2 | [Wh pn] [verb] [adv] [been] able | 20 |
|
| 3 | [Wh pn] [verb] [not/n't] [been] able | 12 |
|
| 4 | [Wh pn] [verb] not [been] able | 12 |
|
| 5 | [Wh pn] [verb] n't [been] [adj] | 8 |
|
| 6 | [Wh pn] [verb] n't [be] able | 5 |
|
