| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] it [be] necessary [to-vb] | 150 |
|
| 2 | it [be] necessary [to-vb] [noun] | 145 |
|
| 3 | [noun sg] [be] necessary [to-vb] [noun] | 29 |
|
| 4 | [noun sg] it [be] [to-vb] [noun] | 28 |
|
