| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | n't know how [verb] [indef pn] | 6 |
|
| 2 | not know how [to-vb] [indef pn] | 6 |
|
| 3 | not know how [verb] [indef pn] | 6 |
|
| 4 | not know how [verb] [indef pn] | 6 |
|
