| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but why do n't [pers pn] [vb infin] | 34 |
|
| 2 | but why did n't [pers pn] [vb infin] | 18 |
|
| 3 | but why do n't you [vb infin] | 18 |
|
| 4 | but why do n't [pers pn] [vb infin] | 16 |
|
| 5 | but why do n't [pers pn] tell | 10 |
|
| 6 | but why do n't we [vb infin] | 6 |
|
