| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [to-vb] [noun] | 52619 |
|
| 2 | necessary [to-vb] [noun] | 617 |
|
| 3 | [verb] necessary [to-vb] | 219 |
|
| 4 | [verb] necessary [noun] | 88 |
|
