| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back and [vb infin] [Wh det] | 11 |
|
| 2 | back and [vb infin] [Wh det] | 11 |
|
| 3 | back [coord] [vb infin] [Wh det] | 11 |
|
| 4 | back [conj] [vb infin] what | 10 |
|
