| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how [vb past] it [verb] | 159 |
|
| 2 | how [vb past] it [vb infin] | 145 |
|
| 3 | [adv] [vb past] it start | 11 |
|
| 4 | [Wh adv] [vb past] it start | 11 |
|
| 5 | how [vb past] [pron] start | 10 |
|
| 6 | how [vb past] it start | 6 |
|
| 7 | how [verb] it start | 5 |
|
| 8 | how [vb past] it start | 5 |
|
