| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is not [adj] for | 350 |
|
| 2 | it is [adv] necessary for | 66 |
|
| 3 | it [be] not necessary for | 54 |
|
| 4 | it be not necessary for | 54 |
|
| 5 | it is not necessary [prep] | 48 |
|
| 6 | it is not necessary for | 40 |
|
| 7 | it is [not/n't] necessary for | 40 |
|
| 8 | it [is] not necessary for | 39 |
|
| 9 | [pron] is not necessary for | 37 |
|
| 10 | [pers pn] is not necessary for | 37 |
|
| 11 | it is not necessary for | 37 |
|
