| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] ensure that the [adj] | 8 |
|
| 2 | is [adj] to ensure that [art] [adj] | 8 |
|
| 3 | is [adj] ensure that [art] [adj] | 7 |
|
| 4 | is important ensure that [art] [adj] | 5 |
|
