| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it can [adv] be doubted that | 7 |
|
| 2 | it can [adv] [be] doubted that | 7 |
|
| 3 | it can [adv] [be] doubted that | 7 |
|
| 4 | it can not [be] doubted that | 6 |
|
| 5 | it can [not/n't] [be] doubted that | 6 |
|
| 6 | it can not [be] doubted that | 6 |
|
