| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [not/n't] been seen [prep] [noun prp] | 11 |
|
| 2 | have [not/n't] been seen [prep] [noun prp] | 11 |
|
| 3 | [vb base] [not/n't] been seen [prep] [noun prp] | 5 |
|
| 4 | have [not/n't] been seen [prep] [noun prp] | 5 |
|
