| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | necessary [verb] that [adj] [noun pl] | 12 |
|
| 2 | necessary [to-vb] that [adj] [noun pl] | 12 |
|
| 3 | necessary ensure that [adj] [noun pl] | 8 |
|
| 4 | necessary to ensure that [adj] [noun pl] | 8 |
|
| 5 | necessary [verb] that [adj] [noun pl] | 7 |
|
