| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] not [verb] | 2061 |
|
| 2 | it [is] difficult [verb] | 1819 |
|
| 3 | it [is] not difficult | 195 |
|
| 4 | [is] not difficult [verb] | 179 |
|
