| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] back [prep] the [noun] | 717 |
|
| 2 | [to-vb] [prep] the [noun] when | 117 |
|
| 3 | back [prep] the [noun] when | 52 |
|
| 4 | [to-vb] back [prep] [noun] when | 5 |
|
