| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] necessary [verb] [noun pl] | 58 |
|
| 2 | [is] [verb] three [noun pl] | 44 |
|
| 3 | [is] necessary [verb] three | 6 |
|
| 4 | necessary [verb] three [noun pl] | 5 |
|
