| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | as [prep] whether [verb] | 47 |
|
| 2 | as to whether [verb] | 47 |
|
| 3 | as to whether [verb] | 47 |
|
| 4 | as [prep] whether [to-vb] | 45 |
|
