| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] not sure whether [pron] | 111 |
|
| 2 | [be] not sure whether [pers pn] | 105 |
|
| 3 | [be] not sure [conj] it | 69 |
|
| 4 | [be] not [adj] whether it | 42 |
|
| 5 | [be] not [adj] whether it | 42 |
|
| 6 | [be] [adv] sure whether it | 35 |
|
| 7 | [be] not sure whether it | 35 |
|
| 8 | [be] [not/n't] sure whether it | 35 |
|
| 9 | [be] not sure whether it | 28 |
|
| 10 | [be] not sure whether it | 28 |
|
