| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have be [verb] | 1134 |
|
| 2 | could be [verb] at | 263 |
|
| 3 | have be [verb] at | 171 |
|
| 4 | could have [verb] at | 48 |
|
| 5 | could have be at | 11 |
|
