| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is important [to-vb] sure that | 6 |
|
| 2 | is important [to-vb] sure that | 6 |
|
| 3 | is important to make sure that | 6 |
|
| 4 | is important [to-vb] sure that | 6 |
|
