| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] not [adv] sure whether | 27 |
|
| 2 | be not [adv] sure whether | 27 |
|
| 3 | [am/are] not [adv] sure whether | 22 |
|
| 4 | [be] not quite sure whether | 15 |
|
| 5 | 'm not [adv] sure whether | 13 |
|
| 6 | 're not [adv] sure whether | 6 |
|
| 7 | [was/were] not [adv] sure whether | 5 |
|
