| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it was [adj] for [pers pn] [verb] | 158 |
|
| 2 | it be necessary for [pers pn] [verb] | 44 |
|
| 3 | it [be] necessary for [pers pn] [verb] | 44 |
|
| 4 | it was necessary [prep] [pers pn] [verb] | 14 |
|
| 5 | it was necessary [prep] [pers pn] [verb] | 14 |
|
| 6 | it was necessary for [pron] [verb] | 14 |
|
| 7 | it was necessary for [pers pn] [verb] | 14 |
|
| 8 | [pron] was necessary for [pers pn] [verb] | 14 |
|
| 9 | it [was/were] necessary for [pers pn] [verb] | 14 |
|
