| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | necessary for [adj] [noun] | 219 |
|
| 2 | [be] for [adj] [noun] | 150 |
|
| 3 | [be] necessary for [adj] | 42 |
|
| 4 | [be] necessary for [noun] | 27 |
|
