| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be doubtful whether [art] | 39 |
|
| 2 | [be] doubtful whether [art] | 39 |
|
| 3 | [be] doubtful whether the | 32 |
|
| 4 | is doubtful whether [art] | 30 |
|
| 5 | [is] doubtful whether [art] | 30 |
|
| 6 | [was/were] doubtful whether [art] | 7 |
|
| 7 | was doubtful whether [art] | 6 |
|
| 8 | [be] doubtful whether a | 6 |
|
