| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it is [adj] [prep] | 218 |
|
| 2 | [verb] it is [adj] [prep] | 192 |
|
| 3 | [verb] it be necessary [prep] | 22 |
|
| 4 | [verb] it [be] necessary [prep] | 22 |
|
| 5 | [verb] it [is] necessary [prep] | 18 |
|
| 6 | [verb] [pron] is necessary [prep] | 13 |
|
| 7 | [verb] it is necessary [prep] | 10 |
|
| 8 | [verb] [pers pn] is necessary [prep] | 10 |
|
| 9 | [verb] it is necessary [prep] | 10 |
|
