| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do not i think | 16 |
|
| 2 | why [vb past] not i think | 16 |
|
| 3 | why did not i think | 16 |
|
| 4 | why [verb] not i think | 16 |
|
| 5 | why [verb] n't i think | 15 |
|
