| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adj] [prep] | 13705 |
|
| 2 | it [be] [adj] [prep] | 10635 |
|
| 3 | [pron] [be] necessary [prep] | 383 |
|
| 4 | [pers pn] [be] necessary [prep] | 282 |
|
| 5 | it [be] necessary [prep] | 270 |
|
| 6 | it [be] necessary [prep] | 270 |
|
