| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] maintain [art] [adj] | 117 |
|
| 2 | could [adv] maintain [art] | 12 |
|
| 3 | could [adv] [art] [adj] | 8 |
|
| 4 | could maintain [art] [adj] | 6 |
|
