| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did n't [pron] do | 22 |
|
| 2 | why did [not/n't] [pers pn] do | 21 |
|
| 3 | why did [not/n't] you do | 10 |
|
| 4 | why did [not/n't] you do | 10 |
|
| 5 | why did [not/n't] they do | 5 |
|
| 6 | why did [not/n't] they do | 5 |
|
