| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but how [vb base] [pron] [adv] [vb infin] | 5 |
|
| 2 | but how do [pron] [adv] [verb] | 5 |
|
| 3 | but how [vb base] [pers pn] [adv] [verb] | 5 |
|
