| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be taken to ensure that [adj] | 25 |
|
| 2 | be to ensure that [adj] [noun pl] | 24 |
|
| 3 | taken to ensure that [adj] [noun pl] | 12 |
|
| 4 | be taken to ensure that [noun pl] | 7 |
|
