| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who has [verb] [prep] | 527 |
|
| 2 | has [verb] back [prep] | 125 |
|
| 3 | who [verb] back [prep] | 56 |
|
| 4 | who has [verb] back | 5 |
|
