| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] necessary for [pers pn] [to-vb] | 44 |
|
| 2 | it be necessary for [pers pn] [verb] | 44 |
|
| 3 | it [is] necessary for [pers pn] [verb] | 27 |
|
| 4 | it is necessary for [pers pn] [verb] | 21 |
|
| 5 | it was necessary for [pers pn] [verb] | 14 |
|
| 6 | it [was/were] necessary for [pers pn] [verb] | 14 |
|
| 7 | it [be] necessary for me [verb] | 13 |
|
| 8 | it [be] necessary for us [verb] | 11 |
|
| 9 | it [be] necessary for him [verb] | 9 |
|
| 10 | it 's necessary for [pers pn] [verb] | 6 |
|
| 11 | it [be] necessary for them [verb] | 5 |
|
