| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and how [verb] it [vb infin] | 23 |
|
| 2 | and how do it [vb infin] | 21 |
|
| 3 | and how [vb -s] it [vb infin] | 16 |
|
| 4 | and how does it [vb infin] | 16 |
|
| 5 | and how [vb past] it [vb infin] | 5 |
|
| 6 | and how did it [vb infin] | 5 |
|
| 7 | and how [verb] it work | 5 |
|
