| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] whether [art] [noun] | 12 |
|
| 2 | could [vb infin] whether [art] [noun] | 12 |
|
| 3 | could [vb infin] whether [art] [noun sg] | 11 |
|
| 4 | could [vb infin] whether the [noun] | 7 |
|
| 5 | could [vb infin] whether a [noun] | 5 |
|
