| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [verb] ensure that the [noun pl] | 7 |
|
| 2 | [was/were] [verb] ensure that [art] [noun pl] | 7 |
|
| 3 | [was/were] [verb] ensure that the [noun pl] | 7 |
|
| 4 | [was/were] [verb] ensure that [art] [noun pl] | 7 |
|
