| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [subord] a [noun] | 96 |
|
| 2 | be necessary [subord] [noun] | 49 |
|
| 3 | be necessary [subord] a | 13 |
|
| 4 | necessary [subord] a [noun] | 8 |
|
