| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] had be unable | 16 |
|
| 2 | [Wh pn] had been unable | 16 |
|
| 3 | who had [be] unable | 16 |
|
| 4 | [Wh pn] had [been] unable | 16 |
|
| 5 | [Wh pn] had [be] unable | 16 |
|
