| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that could have be [vb pp] | 14 |
|
| 2 | that could have be [vb pp] | 14 |
|
| 3 | that could have been [vb pp] | 14 |
|
| 4 | that could have be done | 6 |
|
