| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did [pers pn] [vb infin] [adv] | 143 |
|
| 2 | why did [pers pn] [vb infin] [adv prt] | 60 |
|
| 3 | [adv] did [pers pn] [vb infin] back | 32 |
|
| 4 | [Wh adv] did [pers pn] [vb infin] back | 29 |
|
| 5 | why [vb past] [pers pn] [vb infin] back | 18 |
|
| 6 | why did [pers pn] [verb] back | 18 |
|
| 7 | why did [pron] [vb infin] back | 18 |
|
| 8 | why did [pers pn] [vb infin] back | 18 |
|
| 9 | why do [pers pn] [vb infin] back | 18 |
|
| 10 | why [verb] [pers pn] [vb infin] back | 18 |
|
| 11 | why did [pers pn] [vb infin] back | 18 |
|
