| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is necessary [verb] [noun pl] | 48 |
|
| 2 | it is [verb] these [noun pl] | 9 |
|
| 3 | is necessary [verb] these [noun pl] | 8 |
|
| 4 | it is necessary [verb] these | 8 |
|
