| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could n't [vb infin] whether [art] | 5 |
|
| 2 | [pers pn] could n't [vb infin] whether [art] | 5 |
|
| 3 | could n't [vb infin] whether [art] [noun] | 8 |
|
| 4 | could n't [vb infin] whether [art] [noun sg] | 6 |
|
