| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] it be necessary [to-vb] [noun] | 8 |
|
| 2 | [noun sg] it [be] necessary [to-vb] [noun pl] | 7 |
|
| 3 | [noun sg] it [is] necessary [to-vb] [noun] | 6 |
|
| 4 | [noun sg] it is necessary [to-vb] [noun] | 6 |
|
