| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be necessary to ensure [conj] [adj] [noun pl] | 6 |
|
| 2 | be necessary to ensure that [adj] [noun pl] | 6 |
|
| 3 | be necessary to ensure [that] [adj] [noun pl] | 6 |
|
| 4 | be necessary to ensure that [adj] [noun pl] | 6 |
|
