| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [not/n't] previously been [verb] [prep] | 7 |
|
| 2 | had not previously been [verb] [prep] | 7 |
|
| 3 | had [adv] previously been [vb pp] [prep] | 7 |
|
| 4 | had not previously been [verb] [prep] | 7 |
|
