| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [not/n't] [been] ruled out | 6 |
|
| 2 | had [not/n't] be ruled out | 6 |
|
| 3 | had not [be] ruled out | 6 |
|
| 4 | had [not/n't] been ruled out | 6 |
|
