| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | n't know if i [modal v] | 64 |
|
| 2 | n't know if i [verb] | 61 |
|
| 3 | know if i [modal v] [verb] | 59 |
|
| 4 | n't know i [modal v] [verb] | 20 |
|
