| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] as to maintain | 8 |
|
| 2 | [verb] [adv] as maintain | 8 |
|
| 3 | [verb] so as maintain | 8 |
|
| 4 | [vb pp] [adv] as maintain | 7 |
|
