| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [adv] [subord] [art] | 1083 |
|
| 2 | [adv] [subord] to maintain [art] | 12 |
|
| 3 | [vb pp] [adv] [subord] to maintain | 7 |
|
| 4 | [vb pp] [adv] to maintain [art] | 7 |
|
