| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] back [pos pn] | 135 |
|
| 2 | back over [pos pn] | 116 |
|
| 3 | [v-ing] back over | 68 |
|
| 4 | [v-ing] over [pos pn] | 41 |
|
