| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] so as ensure | 20 |
|
| 2 | [noun] so [subord] to ensure | 20 |
|
| 3 | [noun] so [subord] ensure | 20 |
|
| 4 | [noun sg] so [subord] ensure | 10 |
|
| 5 | [noun pl] so [subord] ensure | 9 |
|
