| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adv] necessary [verb] it | 6 |
|
| 2 | it [be] [adv] necessary [verb] it | 6 |
|
| 3 | it [be] [adv] necessary [verb] it | 6 |
|
| 4 | it [is] [adv] necessary [verb] it | 6 |
|
| 5 | it [be] [adv] necessary [to-vb] it | 6 |
|
| 6 | it be [adv] necessary [verb] it | 6 |
|
| 7 | it is [adv] necessary [verb] it | 5 |
|
