| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [verb] [adv] [vb pp] [prep] | 604 |
|
| 2 | [verb] [adv] [vb pp] back [prep] | 165 |
|
| 3 | who [verb] [vb pp] back [prep] | 31 |
|
| 4 | who [verb] [adv] [vb pp] back | 14 |
|
