| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] necessary [to-vb] [adj] | 171 |
|
| 2 | [that] it [is] necessary [to-vb] | 45 |
|
| 3 | [that] it [is] [to-vb] [adj] | 6 |
|
