| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] that [noun] | 239 |
|
| 2 | is necessary [verb] [noun] | 146 |
|
| 3 | necessary [verb] that [noun] | 26 |
|
| 4 | is necessary [verb] that | 8 |
|
