| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [det] [noun pl] | 531 |
|
| 2 | necessary [verb] [det] [noun pl] | 60 |
|
| 3 | it necessary [verb] [det] | 35 |
|
| 4 | it necessary [verb] [noun pl] | 18 |
|
