| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i [vb base] not been | 448 |
|
| 2 | i [vb base] been to | 159 |
|
| 3 | [vb base] not been to | 54 |
|
| 4 | i [vb base] not to | 28 |
|
