| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how did [pron] [verb] | 1506 |
|
| 2 | [adv] did they [verb] | 412 |
|
| 3 | how [verb] they [verb] | 377 |
|
| 4 | [Wh adv] did they [verb] | 339 |
|
| 5 | how do they [verb] | 331 |
|
| 6 | how [vb past] they [verb] | 160 |
|
| 7 | how did they [verb] | 143 |
|
