| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] necessary [verb] that | 24 |
|
| 2 | it is [adv] necessary [to-vb] that | 24 |
|
| 3 | it is [not/n't] necessary [verb] that | 12 |
|
| 4 | it is not necessary [verb] that | 12 |
|
| 5 | it is [adv] necessary [verb] that | 12 |
|
| 6 | it is not necessary [verb] that | 12 |
|
| 7 | it is [adv] necessary to show that | 5 |
|
| 8 | it is [adv] necessary show that | 5 |
|
