| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but how [verb] | 349 |
|
| 2 | but [adv] did | 297 |
|
| 3 | but how do | 282 |
|
| 4 | but [Wh adv] did | 209 |
|
| 5 | [conj] how did | 194 |
|
| 6 | [coord] how did | 193 |
|
| 7 | but how [vb past] | 103 |
|
| 8 | but how did | 91 |
|
| 9 | but how did | 91 |
|
