| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary for [adj] [noun] | 28 |
|
| 2 | [be] necessary for [adj] [noun sg] | 16 |
|
| 3 | [be] necessary for [det] [noun] | 15 |
|
| 4 | [be] necessary for [adj] [noun] | 13 |
|
| 5 | [be] necessary for [adj] [noun pl] | 12 |
|
| 6 | [be] necessary for [adj] purpose | 5 |
|
