| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] could not be | 145 |
|
| 2 | [adv] could not be | 114 |
|
| 3 | [noun prp] [adv] could not | 43 |
|
| 4 | [noun prp] [adv] could be | 5 |
|
