| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] is not necessary [verb] that | 12 |
|
| 2 | it is not necessary [verb] that | 12 |
|
| 3 | it is not necessary [verb] that | 12 |
|
| 4 | [pron] is not necessary [to-vb] that | 12 |
|
| 5 | [pron] is not necessary [verb] that | 12 |
|
