| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [pron] | 919 |
|
| 2 | [adv] maintain [pron] | 151 |
|
| 3 | could [adv] maintain | 31 |
|
| 4 | could maintain [pron] | 8 |
|
