| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] it [be] not [verb] | 271 |
|
| 2 | [coord] it [be] difficult [verb] | 251 |
|
| 3 | it [be] difficult not [verb] | 40 |
|
| 4 | [coord] it [be] difficult not | 11 |
|
