| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] is [to-vb] that a | 14 |
|
| 2 | [noun sg] is ensure that a | 7 |
|
| 3 | [noun sg] is to ensure that a | 7 |
|
| 4 | [noun sg] is [v-ing] that a | 7 |
|
