| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] could [adv] be | 1086 |
|
| 2 | [noun sg] could not be | 886 |
|
| 3 | could not [adv] be | 276 |
|
| 4 | [noun sg] could not [adv] | 186 |
|
