| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | necessary [verb] that | 172 |
|
| 2 | necessary [to-vb] that | 163 |
|
| 3 | necessary ensure that | 56 |
|
| 4 | necessary to ensure that | 54 |
|
| 5 | necessary to show that | 23 |
|
| 6 | necessary show that | 23 |
|
| 7 | necessary to establish that | 9 |
|
| 8 | necessary prove that | 9 |
|
| 9 | necessary establish that | 9 |
|
| 10 | necessary to prove that | 9 |
|
| 11 | necessary [vb base] that | 7 |
|
| 12 | necessary demonstrate that | 6 |
|
| 13 | necessary to demonstrate that | 6 |
|
