| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it has not [be] [adj] | 103 |
|
| 2 | it has [adv] [be] necessary | 9 |
|
| 3 | it have not [be] necessary | 8 |
|
| 4 | it [verb] not [be] necessary | 8 |
|
| 5 | [pron] has not [be] necessary | 5 |
|
| 6 | it [vb -s] not [be] necessary | 5 |
|
