| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [Wh det] [pron] [verb] [vb pp] back | 5 |
|
| 2 | [Wh det] [pron] [verb] [vb pp] back [prep] | 10 |
|
| 3 | [Wh det] [pron] [verb] [vb pp] back [prep] | 10 |
|
