| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [v-ing] [prep] | 13477 |
|
| 2 | [v-ing] back [prep] | 3877 |
|
| 3 | [coord] back [prep] | 454 |
|
| 4 | [coord] [v-ing] back | 359 |
|
