| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adj] [verb] | 21714 |
|
| 2 | [pron] [be] necessary [verb] | 1455 |
|
| 3 | [pers pn] [be] necessary [verb] | 1386 |
|
| 4 | it [be] necessary [verb] | 1382 |
|
