| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have be [vb pp] | 1057 |
|
| 2 | this have be [vb pp] | 739 |
|
| 3 | this could be [vb pp] | 315 |
|
| 4 | this could have be | 51 |
|
| 5 | this could have [vb pp] | 34 |
|
