| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [vb pp] [verb] that | 31 |
|
| 2 | [is] [adv] [vb pp] [to-vb] that | 27 |
|
| 3 | [is] [adv] [vb pp] ensure that | 11 |
|
| 4 | [is] [adv] [vb pp] to ensure that | 10 |
|
