| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is necessary [verb] [noun] | 146 |
|
| 2 | is [verb] two [noun] | 69 |
|
| 3 | necessary [verb] two [noun] | 14 |
|
| 4 | is necessary [verb] two | 10 |
|
