| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adv] [verb] [adv prt] | 2374 |
|
| 2 | [is] [adv] necessary [verb] | 523 |
|
| 3 | [is] necessary [verb] [adv prt] | 50 |
|
| 4 | [adv] necessary [verb] [adv prt] | 39 |
|
