| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | can be [vb pp] at [det] stage | 14 |
|
| 2 | can be [vb pp] at [det] stage | 13 |
|
| 3 | can be [vb pp] at this stage | 8 |
|
| 4 | can be [vb pp] at any stage | 5 |
|
