| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] to ensure that [adj] [noun pl] | 14 |
|
| 2 | [be] [vb pp] to ensure that [adj] [noun pl] | 7 |
|
| 3 | be [vb pp] to ensure that [adj] [noun pl] | 7 |
|
| 4 | [be] taken to ensure that [adj] [noun pl] | 6 |
|
