| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] for [pron] [verb] | 86 |
|
| 2 | [be] necessary for [pron] [verb] | 80 |
|
| 3 | it [be] necessary for [pron] | 62 |
|
| 4 | it necessary for [pron] [verb] | 9 |
|
