| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how did [pron] [vb infin] | 1497 |
|
| 2 | [adv] did it [vb infin] | 378 |
|
| 3 | how [verb] it [vb infin] | 327 |
|
| 4 | how do it [vb infin] | 319 |
|
| 5 | how [vb past] it [vb infin] | 145 |
|
| 6 | how did it [verb] | 145 |
|
