| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [be] not sure | 1740 |
|
| 2 | [be] not sure whether | 180 |
|
| 3 | [pron] [be] not whether | 10 |
|
| 4 | [pron] [be] sure whether | 5 |
|
