| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [not/n't] been see [prep] [det] | 5 |
|
| 2 | [vb -s] [not/n't] [been] seen [prep] [det] | 5 |
|
| 3 | [vb -s] not [been] see [prep] [det] | 5 |
|
| 4 | has [not/n't] [been] see [prep] [det] | 5 |
|
