| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [adj] whether [art] | 149 |
|
| 2 | [be] doubtful [conj] [art] | 77 |
|
| 3 | [be] doubtful [subord] [art] | 58 |
|
| 4 | [be] doubtful whether [art] | 39 |
|
| 5 | [be] doubtful whether [art] | 39 |
|
