| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] is necessary [verb] that [adj] | 10 |
|
| 2 | it is necessary [verb] that [adj] | 10 |
|
| 3 | [pers pn] is necessary [to-vb] that [adj] | 10 |
|
| 4 | [pers pn] is necessary [verb] that [det] | 5 |
|
