| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | before [v-ing] [pers pn] [adv] | 186 |
|
| 2 | [prep] [v-ing] [pers pn] back | 137 |
|
| 3 | before [v-ing] [pron] back | 18 |
|
| 4 | before [verb] [pers pn] back | 17 |
|
