| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] ensure that | 243 |
|
| 2 | [noun sg] [prep] that they | 72 |
|
| 3 | [noun sg] ensure that they | 59 |
|
| 4 | [prep] ensure that they | 21 |
|
