| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] not [verb] | 2475 |
|
| 2 | it [be] necessary [verb] | 1382 |
|
| 3 | it [be] not necessary | 337 |
|
| 4 | [be] not necessary [verb] | 224 |
|
