| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [verb] the | 3002 |
|
| 2 | [modal v] [adv] maintain the | 15 |
|
| 3 | could [adv] maintain [art] | 12 |
|
| 4 | could [adv] maintain [art] | 12 |
|
| 5 | could [adv] maintain the | 6 |
|
