| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is ensure that [adj] [noun pl] | 21 |
|
| 2 | is to ensure that [adj] [noun pl] | 20 |
|
| 3 | is ensure that [adj] [noun pl] | 10 |
|
| 4 | is ensure that [det] [noun pl] | 10 |
|
