| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not know how [pron] [modal v] | 143 |
|
| 2 | not [verb] how [indef pn] [modal v] | 29 |
|
| 3 | not know [adv] [indef pn] [modal v] | 11 |
|
| 4 | [adv] know how [indef pn] [modal v] | 5 |
|
