| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] ensure that [adj] [noun pl] | 35 |
|
| 2 | necessary [verb] that [adj] [noun pl] | 12 |
|
| 3 | necessary ensure that [adj] [noun] | 11 |
|
| 4 | necessary ensure [that] [adj] [noun pl] | 8 |
|
| 5 | necessary ensure that [adj] [noun pl] | 8 |
|
| 6 | necessary ensure [conj] [adj] [noun pl] | 8 |
|
