| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [verb] [conj] [adj] | 400 |
|
| 2 | [subord] [to-vb] [conj] [adj] | 46 |
|
| 3 | [conj] to ensure [conj] [adj] | 40 |
|
| 4 | [subord] ensure [conj] [adj] | 12 |
|
