| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | necessary [to-vb] [conj] it be [verb] | 5 |
|
| 2 | necessary [to-vb] [conj] it [be] [verb] | 5 |
|
| 3 | necessary [to-vb] [conj] it [be] [vb pp] | 5 |
|
| 4 | necessary [to-vb] [conj] it [be] [verb] | 5 |
|
