| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] not been to | 20 |
|
| 2 | has not be to | 19 |
|
| 3 | [vb -s] n't be to | 12 |
|
| 4 | [vb -s] not be to | 8 |
|
