| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [verb] that | 1964 |
|
| 2 | is [adv] necessary [verb] | 505 |
|
| 3 | is necessary [verb] that | 51 |
|
| 4 | [adv] necessary [verb] that | 32 |
|
| 5 | is [adv] necessary that | 24 |
|
