| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] to ensure that [adj] | 19 |
|
| 2 | is [adj] to ensure that [det] | 9 |
|
| 3 | is [adj] to ensure that [adj] | 8 |
|
| 4 | is necessary to ensure that [adj] | 6 |
|
| 5 | is necessary to ensure that [adj] | 6 |
|
