| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [adj] [to-vb] [noun] | 534 |
|
| 2 | [pron] necessary [to-vb] [noun] | 45 |
|
| 3 | [pers pn] necessary [to-vb] [noun] | 45 |
|
| 4 | it necessary [to-vb] [noun] | 45 |
|
| 5 | it necessary [verb] [noun] | 45 |
|
