| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] not been seen [prep] [adj] | 25 |
|
| 2 | have not been seen [prep] [adj] | 25 |
|
| 3 | had not been seen [prep] [adj] | 12 |
|
| 4 | [vb past] not been seen [prep] [adj] | 12 |
|
| 5 | [vb -s] not been seen [prep] [adj] | 12 |
|
| 6 | has not been seen [prep] [adj] | 12 |
|
| 7 | not been seen [prep] [art] [adj] | 5 |
|
| 8 | not been seen [prep] [art] [adj] | 5 |
|
| 9 | not been seen [prep] [adj] [noun] | 16 |
|
| 10 | not been seen [prep] [adj] [noun pl] | 9 |
|
| 11 | not been seen [prep] [adj] [noun sg] | 5 |
|
