| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how do they [vb infin] it | 37 |
|
| 2 | how [verb] they [vb infin] it | 37 |
|
| 3 | how [vb base] they [vb infin] it | 24 |
|
| 4 | how do they [vb infin] it | 24 |
|
| 5 | how [verb] they do it | 16 |
|
| 6 | how [vb past] they [vb infin] it | 13 |
|
| 7 | how did they [vb infin] it | 13 |
|
