| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it is necessary [prep] | 24 |
|
| 2 | [subord] it is necessary [prep] | 24 |
|
| 3 | [subord] it is necessary for | 14 |
|
| 4 | [subord] it is necessary for | 14 |
|
| 5 | [subord] it is necessary to | 6 |
|
| 6 | [subord] it is necessary to | 6 |
|
