| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb base] back to [art] | 11 |
|
| 2 | which [vb base] back [prep] [art] | 11 |
|
| 3 | [Wh det] [vb base] back [prep] [art] | 11 |
|
| 4 | [Wh det] [vb base] back to [art] | 11 |
|
| 5 | [Wh det] [vb base] back [prep] the | 10 |
|
| 6 | [Wh det] date back [prep] [art] | 8 |
|
