| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] not [be] necessary | 8 |
|
| 2 | it [verb] not [be] necessary | 8 |
|
| 3 | it have not [be] necessary | 8 |
|
| 4 | it [verb] not [been] necessary | 8 |
|
| 5 | it [verb] not [be] necessary | 8 |
|
| 6 | it [verb] not be necessary | 8 |
|
| 7 | it [verb] not been necessary | 8 |
|
| 8 | it [vb -s] not [be] necessary | 5 |
|
| 9 | it has not [be] necessary | 5 |
|
