| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it [is] necessary [to-vb] | 60 |
|
| 2 | [verb] that it [is] necessary | 46 |
|
| 3 | that it [is] necessary [to-vb] | 45 |
|
| 4 | [verb] that it [is] [to-vb] | 37 |
|
