| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but why did [not/n't] you [verb] | 10 |
|
| 2 | but why did n't you [verb] | 10 |
|
| 3 | but why did [not/n't] you [vb infin] | 10 |
|
| 4 | but why did [not/n't] you tell | 6 |
|
| 5 | but why did [not/n't] you tell | 6 |
|
