| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [verb] [adv] [pers pn] [vb infin] | 1946 |
|
| 2 | [verb] [adv] [pers pn] [vb infin] back | 32 |
|
| 3 | why [verb] [pers pn] [vb infin] back | 18 |
|
