| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know why he [verb] [pers pn] | 13 |
|
| 2 | know why he [verb] it | 8 |
|
| 3 | know why he [vb past] [pers pn] | 8 |
|
| 4 | know why he [vb -s] [pers pn] | 5 |
|
