| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun sg] [vb -s] | 1698 |
|
| 2 | [prep] whether a [noun sg] | 154 |
|
| 3 | whether a [noun sg] [vb -s] | 96 |
|
| 4 | [prep] whether [noun sg] [vb -s] | 17 |
|
