| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] also be [verb] | 528 |
|
| 2 | it [vb mod] be necessary [verb] | 415 |
|
| 3 | it [vb mod] also be necessary | 27 |
|
| 4 | [vb mod] also be necessary [verb] | 23 |
|
