| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [to-vb] [conj] it [be] [verb] | 45 |
|
| 2 | necessary [to-vb] [conj] [pron] [be] [verb] | 6 |
|
| 3 | necessary [verb] [conj] it [be] [verb] | 5 |
|
