| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | reason why they do [not/n't] | 8 |
|
| 2 | reason why they do not | 8 |
|
| 3 | reason why they did [adv] | 7 |
|
| 4 | reason why they do [adv] | 6 |
|
