| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i [verb] [vb pp] | 43589 |
|
| 2 | i [verb] back | 2044 |
|
| 3 | [verb] [vb pp] back | 1338 |
|
| 4 | i [vb pp] back | 6 |
|
