| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how did [pron] [verb] this [noun] | 7 |
|
| 2 | how [vb past] [pron] [verb] this [noun sg] | 7 |
|
| 3 | how [vb past] [pron] [verb] this [noun] | 7 |
|
| 4 | how [vb past] [pers pn] [verb] this [noun] | 7 |
|
| 5 | how [vb past] [pron] [vb infin] this [noun] | 6 |
|
