| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [verb] [adj] [noun pl] | 1771 |
|
| 2 | [is] necessary [verb] [adj] | 216 |
|
| 3 | necessary [verb] [adj] [noun pl] | 215 |
|
| 4 | [is] necessary [verb] [noun pl] | 58 |
|
