| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary [subord] a [noun sg] | 5 |
|
| 2 | [be] necessary [subord] a [noun sg] | 5 |
|
| 3 | necessary [subord] a [adj] [noun sg] | 8 |
|
| 4 | necessary [subord] a [adj] [noun sg] | 8 |
|
