| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] doubtful [subord] [art] [noun sg] | 20 |
|
| 2 | it [is] doubtful [subord] [art] [noun sg] | 20 |
|
| 3 | it is doubtful [subord] [art] [noun sg] | 20 |
|
| 4 | it [is] doubtful [subord] [art] [noun sg] | 20 |
|
| 5 | it [is] doubtful [subord] the [noun sg] | 17 |
|
| 6 | it [is] doubtful [subord] the [noun sg] | 17 |
|
| 7 | it [is] doubtful whether [art] [noun sg] | 11 |
|
| 8 | it [is] doubtful if [art] [noun sg] | 9 |
|
