| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [noun] it is necessary | 111 |
|
| 2 | [adj] [noun] is necessary for | 34 |
|
| 3 | [noun] it is necessary for | 14 |
|
| 4 | [adj] [noun] it is for | 8 |
|
