| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] [adv] necessary for | 10 |
|
| 2 | it is [adv] [adv] necessary for | 9 |
|
| 3 | it [is] [adv] [adv] necessary for | 5 |
|
| 4 | it [is] not [adv] necessary for | 5 |
|
| 5 | it [is] not [adv] necessary for | 5 |
|
| 6 | it [is] [not/n't] [adv] necessary for | 5 |
|
