| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is necessary [verb] [adj] | 59 |
|
| 2 | it is [verb] [adj] [noun pl] | 59 |
|
| 3 | it is necessary [verb] [noun pl] | 48 |
|
| 4 | is necessary [verb] [adj] [noun pl] | 29 |
|
| 5 | it necessary [verb] [adj] [noun pl] | 7 |
|
