| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [adv] maintain | 12 |
|
| 2 | [pers pn] could [adv] maintain | 9 |
|
| 3 | [pron] could [not/n't] maintain | 7 |
|
| 4 | [pron] could not maintain | 7 |
|
| 5 | [pron] could not maintain | 6 |
|
| 6 | [pron] could [adv] maintain | 5 |
|
