| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] is [adv] necessary [verb] that | 24 |
|
| 2 | it is [adv] necessary [verb] that | 24 |
|
| 3 | [pron] is [adv] necessary [verb] that | 24 |
|
| 4 | it is [adv] necessary [verb] that | 24 |
|
| 5 | is [adv] necessary [verb] that [art] | 14 |
|
| 6 | is [adv] necessary [verb] that [art] | 14 |
|
| 7 | is [adv] necessary [verb] that the | 9 |
|
| 8 | is [adv] necessary [verb] that the | 9 |
|
| 9 | is [adv] necessary [verb] that [pron] | 6 |
|
