| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] be [verb] | 49467 |
|
| 2 | could be [verb] | 15990 |
|
| 3 | [noun prp] could [verb] | 3764 |
|
| 4 | [noun prp] could be | 820 |
|
