| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [num] [noun pl] | 297 |
|
| 2 | is necessary [verb] [noun pl] | 56 |
|
| 3 | necessary [verb] [num] [noun pl] | 23 |
|
| 4 | is necessary [verb] [num] | 18 |
|
