| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be not necessary [verb] that | 13 |
|
| 2 | be not necessary [to-vb] that | 13 |
|
| 3 | be not necessary [verb] that | 13 |
|
| 4 | is not necessary [verb] that | 12 |
|
