| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] necessary for [noun] | 7 |
|
| 2 | it is necessary for [art] [noun] | 35 |
|
| 3 | it is necessary for [art] [noun] | 35 |
|
| 4 | it is necessary for the [noun] | 31 |
|
| 5 | it is necessary for the [noun] | 31 |
|
| 6 | it is necessary for [adj] [noun] | 10 |
|
| 7 | it is necessary for [adj] [noun] | 5 |
|
