| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] necessary for them [verb] | 5 |
|
| 2 | it [be] necessary [prep] them [verb] | 5 |
|
| 3 | it [be] necessary for them [verb] | 5 |
|
| 4 | it be necessary [prep] them [verb] | 5 |
|
| 5 | it [be] necessary [prep] them [verb] | 5 |
|
| 6 | it [be] necessary [prep] them [to-vb] | 5 |
|
| 7 | it [be] necessary [prep] them [verb] | 5 |
|
