| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [adj] [verb] | 3008 |
|
| 2 | [conj] it [be] necessary [verb] | 265 |
|
| 3 | [conj] it be necessary [verb] | 265 |
|
| 4 | [conj] it [is] necessary [verb] | 186 |
|
| 5 | [conj] [pron] is necessary [verb] | 174 |
|
