| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to ensure [that] it [is] [adv] [verb] | 10 |
|
| 2 | to ensure that it [is] [adv] [verb] | 10 |
|
| 3 | to ensure [conj] it [is] [adv] [verb] | 10 |
|
| 4 | to ensure that it [is] [adv] [verb] | 10 |
|
| 5 | to ensure [conj] it [is] [adv] [vb pp] | 9 |
|
| 6 | to ensure [conj] it is [adv] [verb] | 8 |
|
| 7 | to ensure [conj] it [is] [adv] [verb] | 6 |
|
