| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [not/n't] [adv] [verb] | 549 |
|
| 2 | it [is] [adv] necessary [verb] | 296 |
|
| 3 | it [is] [not/n't] necessary [verb] | 183 |
|
| 4 | it [is] [not/n't] [adv] necessary | 48 |
|
| 5 | [is] [not/n't] [adv] necessary [verb] | 26 |
|
