| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [not/n't] been seen [prep] [num] | 10 |
|
| 2 | [verb] [not/n't] been seen [prep] [num] | 10 |
|
| 3 | [vb past] [not/n't] been seen [prep] [num] | 5 |
|
| 4 | had [not/n't] been seen [prep] [num] | 5 |
|
| 5 | [not/n't] been seen [prep] [num] [noun pl] | 7 |
|
| 6 | [not/n't] been seen [prep] [num] [noun] | 7 |
|
