| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] necessary [verb] | 286 |
|
| 2 | it is necessary [verb] it | 12 |
|
| 3 | it is [adv] [verb] it | 8 |
|
| 4 | is [adv] necessary [verb] it | 5 |
|
