| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] to ensure that | 57 |
|
| 2 | it is [adj] ensure that | 56 |
|
| 3 | it is important ensure that | 27 |
|
| 4 | it is important ensure that | 27 |
|
| 5 | it is necessary ensure that | 9 |
|
| 6 | it is necessary ensure that | 9 |
|
| 7 | it is essential ensure that | 8 |
|
| 8 | it is essential ensure that | 8 |
|
