| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [adj] whether | 92 |
|
| 2 | [conj] it is doubtful [conj] | 70 |
|
| 3 | [conj] it [be] doubtful whether | 48 |
|
| 4 | [conj] it be doubtful whether | 48 |
|
| 5 | [conj] it [is] doubtful whether | 43 |
|
| 6 | [conj] [pers pn] is doubtful whether | 41 |
|
| 7 | [conj] [pron] is doubtful whether | 41 |
|
| 8 | [conj] it is doubtful whether | 41 |
|
