| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] so as to maintain [art] | 7 |
|
| 2 | [vb pp] so as to maintain [art] | 6 |
|
| 3 | so as to maintain [art] [adj] | 5 |
|
| 4 | so as to maintain [art] [noun sg] | 5 |
|
| 5 | so as to maintain [art] [noun] | 5 |
|
