| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] to ensure that [noun] | 17 |
|
| 2 | is [vb pp] [to-vb] that [noun pl] | 13 |
|
| 3 | is [vb pp] [to-vb] that [noun sg] | 7 |
|
| 4 | is designed [to-vb] that [noun] | 6 |
|
