| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [adv] [be] necessary [verb] | 107 |
|
| 2 | it [vb mod] also [be] [adj] [verb] | 106 |
|
| 3 | it [vb mod] [adv] [be] necessary [verb] | 77 |
|
| 4 | it [modal v] also [be] necessary [verb] | 22 |
|
| 5 | it [vb mod] also [be] necessary [verb] | 22 |
|
| 6 | it [vb mod] also [be] necessary [verb] | 22 |
|
| 7 | [pron] [vb mod] also [be] necessary [verb] | 22 |
|
