| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] to ensure [conj] [art] | 173 |
|
| 2 | [am/are] [vb pp] [verb] [conj] [art] | 82 |
|
| 3 | [am/are] [vb pp] [to-vb] [conj] [art] | 77 |
|
| 4 | [am/are] [verb] to ensure [conj] [art] | 28 |
|
| 5 | [am/are] [vb pp] ensure [conj] [art] | 25 |
|
