| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] necessary [to-vb] [adj] [prep] | 18 |
|
| 2 | it be necessary [to-vb] [adj] [prep] | 18 |
|
| 3 | it is necessary [to-vb] [adj] [prep] | 13 |
|
| 4 | it [is] necessary [to-vb] [adj] [prep] | 13 |
|
| 5 | it [was/were] necessary [to-vb] [adj] [prep] | 5 |
|
| 6 | it was necessary [to-vb] [adj] [prep] | 5 |
|
| 7 | it necessary [to-vb] [adj] [noun] [prep] | 18 |
|
| 8 | it necessary [to-vb] [adj] [noun sg] [prep] | 10 |
|
| 9 | it necessary [to-vb] [adj] [noun pl] [prep] | 8 |
|
