| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | n't know how he [verb] | 44 |
|
| 2 | know how he [modal v] [verb] | 24 |
|
| 3 | n't know how he [modal v] | 12 |
|
| 4 | n't know he [modal v] [verb] | 7 |
|
