| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is not [verb] that | 536 |
|
| 2 | is not necessary [verb] | 182 |
|
| 3 | is necessary [verb] that | 51 |
|
| 4 | not necessary [verb] that | 14 |
|
| 5 | is not necessary that | 7 |
|
