| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adj] | 89755 |
|
| 2 | it [be] [adj] | 70610 |
|
| 3 | [pron] [be] necessary | 2265 |
|
| 4 | it [be] necessary | 1964 |
|
