| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be doubtful whether [pron] | 50 |
|
| 2 | be [adj] whether it | 41 |
|
| 3 | be [adj] whether it | 41 |
|
| 4 | be doubtful whether [pers pn] | 35 |
|
| 5 | be doubtful [conj] it | 15 |
|
| 6 | be doubtful [subord] it | 14 |
|
| 7 | [be] doubtful whether it | 11 |
|
| 8 | be doubtful whether it | 11 |
|
| 9 | be doubtful whether it | 11 |
|
| 10 | be doubtful whether it | 11 |
|
