| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do [pron] [verb] [prep] | 108 |
|
| 2 | why do [pron] [not/n't] [verb] | 39 |
|
| 3 | do [pron] [not/n't] [verb] [prep] | 19 |
|
