| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] for [pers pn] [verb] | 79 |
|
| 2 | [be] necessary for [pers pn] [verb] | 72 |
|
| 3 | it [be] necessary for [pers pn] | 50 |
|
| 4 | it necessary for [pers pn] [verb] | 9 |
|
