| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [verb] [adv prt] | 1805 |
|
| 2 | is [adv] necessary [verb] | 505 |
|
| 3 | is necessary [verb] [adv prt] | 48 |
|
| 4 | [adv] necessary [verb] [adv prt] | 39 |
|
