| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it [be] [prep] | 1218 |
|
| 2 | it [be] necessary [prep] | 270 |
|
| 3 | [verb] it [be] necessary | 129 |
|
| 4 | [verb] it necessary [prep] | 55 |
|
| 5 | [verb] [be] necessary [prep] | 51 |
|
