| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] it is [adj] [prep] | 508 |
|
| 2 | [conj] it is necessary [prep] | 46 |
|
| 3 | [coord] it be necessary [prep] | 14 |
|
| 4 | [coord] it [be] necessary [prep] | 14 |
|
| 5 | [coord] it [is] necessary [prep] | 11 |
|
| 6 | [coord] [pron] is necessary [prep] | 10 |
|
| 7 | [coord] it is necessary [prep] | 9 |
|
| 8 | [coord] [pers pn] is necessary [prep] | 9 |
|
