| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do not [pers pn] come back | 9 |
|
| 2 | why do [not/n't] [pers pn] come back | 9 |
|
| 3 | why do n't [pers pn] come back | 9 |
|
| 4 | why do [adv] you come back | 9 |
|
| 5 | why do [adv] [pers pn] come back | 6 |
|
