| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] sure whether [art] [noun sg] | 15 |
|
| 2 | [not/n't] sure whether [art] [noun sg] | 14 |
|
| 3 | not sure whether [art] [noun sg] | 14 |
|
| 4 | not sure whether [art] [noun sg] | 13 |
|
| 5 | sure whether [art] [noun sg] [verb] | 6 |
|
