| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] back to | 1857 |
|
| 2 | [v-ing] [pn reflx] to | 629 |
|
| 3 | [pn reflx] back to | 49 |
|
| 4 | [v-ing] [pn reflx] back | 33 |
|
