| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but how [verb] they [vb infin] | 16 |
|
| 2 | but how do they [vb infin] | 16 |
|
| 3 | but how [verb] they [vb infin] | 16 |
|
| 4 | but how do they [vb infin] | 10 |
|
| 5 | but how [vb base] they [vb infin] | 10 |
|
| 6 | but how [vb past] they [vb infin] | 6 |
|
| 7 | but how did they [vb infin] | 6 |
|
