| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] not [verb] | 1885 |
|
| 2 | it [is] necessary [verb] | 1094 |
|
| 3 | it [is] not necessary | 279 |
|
| 4 | [is] not necessary [verb] | 190 |
|
