| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not know [subord] i | 293 |
|
| 2 | n't know [subord] i | 280 |
|
| 3 | not know if i | 161 |
|
| 4 | not know whether i | 114 |
|
| 5 | not know [subord] i | 16 |
|
| 6 | not know because i | 7 |
|
| 7 | not know cos i | 7 |
|
