| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [vb pp] a significant | 54 |
|
| 2 | [vb pp] a significant role | 18 |
|
| 3 | [vb -s] a significant role | 13 |
|
| 4 | [vb -s] [vb pp] a role | 9 |
|
